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Kohen
Kohen
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Kohen (Hebrew: כֹּהֵן, romanizedkōhēn, pronounced [koˈ(h)en]; pl. כֹּהֲנִים, kōhănīm, [ko(h)aˈnim]) is the Hebrew word for "priest", used in reference to the Aaronic priesthood, also called Aaronites or Aaronides.[1] They are traditionally believed, and halakhically required, to be of direct patrilineal descent from the biblical Aaron (also Aharon), brother of Moses, and thus belong to the Tribe of Levi.[2]

During the existence of the Temple in Jerusalem (and previously the Tabernacle), kohanim performed the Temple sacrificial offerings, which were only permitted to be offered by them. Following its destruction, it seems that most of them joined the Synagogal Jewish movement before adopting gradually Rabbinic Judaism, other types of Judaism, Christianity or Islam.[3] Today, kohanim retain a lesser though distinct status within Rabbinic and Karaite Judaism, including certain honors and restrictions.

In the Samaritan community, the kohanim have remained the primary religious leaders.[citation needed] Ethiopian Jewish religious leaders are called kahen, and do similar works to the kohanim.[citation needed]

Name

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The word kohen originally derives from a Semitic root common at least to the Central Semitic languages. In the ancient polytheistic religion of Phoenicia, the word for priest was khn (𐤊𐤄𐤍‎). The cognate Arabic word كاهن (kāhin) means "priest".[4]

The noun kohen is used in the Bible to refer to priests, whether Jewish or pagan (such as the kohanim of Baal or Dagon),[5] although Christian priests are referred to in modern Hebrew by the term komer (כומר).[6] Kohanim can also refer to the Jewish nation as a whole, as in Exodus 19:6, where the whole of Israel is addressed as a "priestly kingdom (or: kingdom of priests) and a holy nation".

In Targum Yonatan, interpretive translations of the word kohen include "friend",[7] "master",[8] and "servant".[9] Other interpretations include "minister" (Mechilta to Parshah Jethro, Exodus 18:1–20:23).

Individuals and history

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Illustration of Aaron's lineage from the 1493 Nuremberg Chronicle

The early books of the Bible mention several pagan priests, such as Potipherah,[10] the other priests of Egypt,[11] and Jethro.[12]

The non-Jewish priest Melchitzedek, however, is described as worshipping the same God as Abraham.[13] Later Jewish sources even discuss the possibility that Melchitzedek's family could have served as priests for the future Jewish nation, though in the end this did not happen.[14]

Jewish priests are first mentioned in Exodus 19. Here God offered the entire Jewish people the opportunity to become a symbolic "kingdom of priests and a holy nation".[15] More practically, though, in this chapter "the priests who approach the Lord" were warned to stay away from Mount Sinai during the revelation of the Ten Commandments.[16] The identity of these priests is not specified. According to many later Jewish sources, the firstborn son in each family served as priests, starting in the period of the patriarchs.[17]

Nevertheless, shortly after the Sinai revelation, Aaron and his sons were chosen to be the priests.[18] The exclusive possession of the priesthood by Aaron's descendants was known as the priestly covenant. Many commentators assert that the firstborns lost their status due to their participation in the golden calf sin.[17] A number of reasons have been suggested for why Aaron and his descendants were chosen instead:[19]

  • Due to Aaron's role in the Exodus, alongside Moses[20]
  • As reward for greeting Moses cheerfully (Exodus 4:14), willingly subordinating himself to Moses in the Exodus, even though he (Aaron) was the elder of the two brothers[21]
  • Because Aaron possessed a higher level of prophecy than anyone at the time except Moses himself[22]
  • The Tribe of Levi, and possibly even Aaron's own family within that tribe, maybe have been chosen for Divine service even before the Exodus.[17]
  • Because Moses himself was unsuitable to serve as priest, either for general reasons (e.g., the priestly duties would not have left Moses enough time for leadership and Torah instruction[23]) or as punishment for trying to avoid his Divine mission in Exodus 4:13[24]
  • Because Moses had a non-Israelite wife (Tzipporah), while Aaron's wife Elisheba was not only Israelite but noble (the sister of Nahshon prince of Judah), and thus more suitable to found the priestly family[23]

Moses, too, performed sacrificial services before the completion of Aaron's consecration,[25] and arguably is once called a "priest" in the Bible,[26] but his descendants were not priests.[27]

Since Aaron was a descendant of the Tribe of Levi, priests are sometimes included in the term Levites, by direct patrilineal descent. However, not all Levites are priests.

During the 40 years of wandering in the wilderness and until the Holy Temple was built in Jerusalem, the priests performed their priestly service in the portable Tabernacle.[28]

Ancient roles

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Laws and duties

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Priestly duties involved offering the Temple sacrifices, and delivering the Priestly Blessing. When the Temple existed, most sacrifices and offerings could only be conducted by priests. Non-priest Levites (i.e. those who descended from Levi but not from Aaron) performed a variety of other Temple roles, including ritual slaughter of sacrificial animals, song service by use of voice and musical instruments, and various tasks in assisting the priests in performing their service.

The kohanim were not granted any ancestral land to own.[29] Instead, they were compensated for their service to the nation and in the Temple through the twenty-four kohanic gifts.[30] Most of these gifts are related to Temple sacrifices, or else the agricultural produce of the Land of Israel (such as terumah). A notable gift which is given even in the Jewish diaspora is the five shekels of the pidyon haben ceremony.

Vestments

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The high priest in his golden garments (the chain censer depicted is anachronistic).
The priestly breastplate of the high priest.
Kohen, Kohen Gadol and a Levite (Charles Foster, 1873)

The Torah provides for specific vestments to be worn by the priests when they are ministering in the Tabernacle: "And you shall make holy garments for Aaron your brother, for dignity and for beauty".[31] These garments are described in Exodus 28, Exodus 39 and Leviticus 8. The high priest wore eight holy garments (bigdei kodesh). Of these, four were of the same type worn by all priests and four were unique to the high priest.

Those vestments which were common to all priests were:

  • Priestly undergarments (Hebrew michnasayim, breeches): linen pants reaching from the waist to the knees "to cover their nakedness" (Exodus 28:42)
  • Priestly tunic (Hebrew ketonet, tunic): made of pure linen, covering the entire body from the neck to the feet, with sleeves reaching to the wrists. That of the high priest was embroidered, those of the priests were plain.[32]
  • Priestly sash (Hebrew avnet, sash): that of the high priest was of fine linen with "embroidered work" in blue and purple and scarlet (Exodus 28:39, 39:29); those worn by the priests were of white, twined linen.
  • Priestly turban (Hebrew mitznefet): that of the high priest was much larger than that of the priests and wound so that it formed a broad, flat-topped turban; that for priests was wound so that it formed a cone-shaped turban, called a migbahat.

The vestments that were unique to the high priest were:

  • Priestly robe (me'il): a sleeveless, blue robe, the lower hem of which was fringed with small golden bells alternating with pomegranate-shaped tassels in blue, purple, and scarlet—tekhelet, argaman, tolaat shani.
  • Ephod: a richly embroidered vest or apron with two onyx engraved gemstones on the shoulders, on which were engraved the names of the tribes of Israel
  • Priestly breastplate (Hebrew hoshen): with twelve precious and semi-precious stones, each engraved with the name of one of the tribes; a pouch in which he probably carried the Urim and Thummim (objects of unclear nature used for divination). The hoshen was fastened to the Ephod.
  • Priestly headplate (Hebrew tzitz): worn on the front of the turban, and inscribed with the words: "Holy unto YHWH".
Qodeš l-Yahweh (Paleo-Hebrew alphabet), "Holy to Yahweh", an inscription worn on the forehead of the High Priest of Israel

In addition to the above "golden garments", the high priest also had a set of white "linen garments" (bigdei ha-bad) which he wore only for the Yom Kippur Temple service.[33] The linen garments were only four in number, corresponding to the garments worn by all priests (undergarments, tunic, sash and turban), but made only of white linen, with no embroidery. They could be worn only once, new sets being made each year.

A priest would serve barefoot in the Temple, and would immerse in a mikvah before vesting, and wash his hands and his feet before performing any sacred act. The Talmud teaches that priests were only fit to perform their duties when wearing their priestly vestments,[34] and that the vestments achieve atonement for sin, just as sacrifices do.[35]

According to the Talmud, the wearing of the Priestly golden head plate atoned for the sin of arrogance on the part of the Children of Israel (B.Zevachim 88b) and she also symbolizes that the high priest bears the lack of all the offerings and gifts of the sons of Israel. And it must be constantly on his head for the good pleasure of God towards them (Exodus 28:38).

Torah instruction

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A group of kohanim studying the Mishnayot laws of Keilim in anticipation of the rebuilding of the Beit Hamikdash

Numerous Biblical passages attest to the role of the priests in teaching Torah to the people and in issuing judgment. Later rabbinic statements elaborate on these roles. However, the priest's religious authority is not automatic: even a bastard who is a scholar takes precedence over an ignorant high priest.[39]

High Priest

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In every generation when the Temple was standing, one kohen would be singled out to perform the functions of the High Priest (Hebrew kohen gadol). His primary task was the Day of Atonement service. Another unique task of the high priest was the offering of a daily meal sacrifice; he also held the prerogative to supersede any priest and offer any offering he chose. Although the Torah retains a procedure to select a High Priest when needed, in the absence of the Temple in Jerusalem, there is no High Priest in Judaism today.

Twenty-four kohanic divisions

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According to 1 Chronicles 24:3–5, King David divided the priests into 24 priestly divisions (Heb. משמרות, mishmarot). Each division would perform the Temple service for one week in a 24-week cycle, with all divisions eligible to serve on holidays. According to the Talmud, this was an expansion of a previous division, by Moses, into 8 (or 16) divisions.[40]

Following the destruction of the Second Temple, and the displacement to the Galilee of the bulk of the remaining Jewish population after the Bar Kokhba revolt, Jewish tradition in the Talmud and poems from the period record that the descendants of each priestly watch established a separate residential seat in towns and villages of the Galilee, and maintained this residential pattern for at least several centuries in anticipation of the reconstruction of the Temple and reinstitution of the cycle of priestly courses. In subsequent years, there was a custom of publicly recalling every Shabbat in the synagogues the courses of the priests, a practice that reinforced the prestige of the priests' lineage.[41] Following this destruction, it seems that most of them joined the Synagogal Jewish movement; before being gradually converted towards Rabbinic Judaism and Christianity.[3]

Qualifications and disqualifications

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Although kohanim may assume their duties once they reached physical maturity, the fraternity of kohanim generally would not allow young kohanim to begin service until they reached the age of twenty[42] or thirty.[43] There was no mandatory retirement age. Only when a kohen became physically infirm could he no longer serve.[44]

A kohen may become disqualified from performing his service for a host of reasons, including ritual impurity,[45] prohibited marriages, and certain physical blemishes.[46] The kohen is never permanently disqualified from service, but may return to his normal duties once the disqualification ceases.

Modern practice

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Since the destruction of the Second Temple in 70 CE, Jewish priests have not performed sacrificial services. However, they have retained a formal and public ceremonial role in synagogue prayer services, along with certain unique religious duties and privileges. Following the First Jewish–Roman War, the priestly class relocated to Galilee and various diaspora communities, with their new places of residence recorded in inscriptions from the period.[47] Drawing on their knowledge of the Torah and Temple worship, they contributed to the development of synagogue liturgy and may have played a role in the preparation of biblical translations.[47]

These special roles have been maintained in Orthodox Judaism, and sometimes in Conservative Judaism. Reform Judaism does not afford any special status or recognition to kohanim.

  • In Jerusalem is "Temple Institute" whose mission is to prepare the Jewish People and the non jewish nations of the world for the Third Temple which will take the place of the first two destroyed Jewish Temples. Even the Anti-Zionist Toldos Aharon chassidic movement has established a specialized study program for Jewish priests (kohanim) to prepare for Temple service.[48]

Synagogue aliyah

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When the Torah reading is performed in synagogue, it is divided into a number of sections. Traditionally, a kohen (if one is present) is called for the first section (aliyah), a Levite for the second reading, and an "Israelite" (non-kohen, non-levite) for all succeeding portions. If no Levite is present, the kohen is called for the second aliyah as well. The Maftir portion may be given to someone from any of the three groups.

Large crowds congregate on Passover at the Western Wall to receive the priestly blessing
Blessing gesture depicted on the gravestone of Rabbi Meschullam Kohn (1739–1819), who was a kohen

Priestly blessing

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The kohanim participating in an Orthodox and some other styles of traditional Jewish prayer service also deliver the priestly blessing during the repetition of the Amidah prayer.[49] They perform this service by standing and facing the crowd in the front of the congregation, with their arms held outwards and their hands and fingers in a specific formation, with a Jewish prayer shawl or Talit covering their heads and outstretched hands so that their fingers cannot be seen. Kohanim living in Israel and many Sephardic Jews living in areas outside Israel deliver the priestly blessing daily; Ashkenazi Jews living outside Israel deliver it only on major Jewish holidays.

Pidyon haben (redemption of the firstborn)

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Outside the synagogue, the kohen leads the pidyon haben ceremony. This redemption of the first born son is based on the Torah commandment, "all the first-born of man among thy sons shalt thou redeem".[50]

Marital restrictions

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Leviticus 21:7 prohibits marriage between a kohen and certain classes of women. According to rabbinic law, these classes include divorcees, non-Jews, converts (who were previously non-Jews), and women who have previously engaged in certain forbidden sexual relationships (even if involuntary, i. e., rape).[51] If a kohen did have relations with any of these women, the offspring are described as "profaned" (male: challal, female: challalah); their status is nearly identical to a normal Jew, while the challalah herself is one of the categories which a kohen may not marry.[52]

Rape poses an especially poignant problem. The pain experienced by the families of kohanim who were required to divorce their wives as the result of the rapes accompanying the capture of Jerusalem is alluded to in this Mishnah:

If a woman were imprisoned by non-Jews concerning money affairs, she is permitted to her husband, but if for some capital offense, she is forbidden to her husband. If a town were overcome by besieging troops, all women of priestly stock found in it are ineligible [to be married to priests or to remain married to priests], but if they had witnesses, even a male or female slave, these may be believed. But no man may be believed for himself. Rabbi Zechariah ben Hakatsab said, "By this Temple, her hand did not stir from my hand from the time the non-Jews entered Jerusalem until they went out." They said to him: No man may give evidence of himself.[53]

Orthodox Judaism recognizes these rules as still binding, and Orthodox rabbis will not perform a marriage between a kohen and a divorced woman.[54] This is the attitude of the Israeli rabbinate, with the result that a kohen cannot legally marry a divorced or converted woman in the State of Israel. (However, if such a marriage were performed outside Israel, it would be recognized as a valid marriage by the Israeli state.[54])

Conservative Judaism has issued an emergency takanah (rabbinical edict) temporarily suspending the application of the rules in their entirety, on the grounds that the high intermarriage rate threatens the survival of Judaism, and, hence, that any marriage between Jews is welcomed.[55] The takanah declares that the offspring of such marriages are to be regarded as kohanim.[55]

Other laws

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To this day, kohanim keep the prohibition (Leviticus 21:1–4) against becoming ritually impure through proximity to a corpse (within the same room, at a cemetery, and elsewhere), except when the deceased is his immediate family member. Some Jewish cemeteries have special facilities to permit kohanim to participate in funerals or visit graves without becoming impure.[56]

The presumption of priestly descent is used to help identify kohanim.

Other Jews are commanded to respect the priesthood in certain ways. One of these ways is that priests (and in their absence, occasionally Levites) are the first offered the opportunity to lead Birkat Hamazon. Unlike the general rule for aliyot, this offer - which is only a requirement according to some Rabbinic opinions - may be declined. There are other rules regarding the honoring of kohanim, even in the absence of the Temple, but generally these are waived (if they are even offered) by the kohen.

Bat kohen

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Kohen is a status that traditionally refers to men, passed from father to son. However, a bat kohen (the daughter of a priest) holds a special status in the Hebrew Bible and rabbinical texts. She is entitled to a number of rights and is encouraged to abide by specified requirements, for example, entitlement to consume some of the priestly gifts, and an increased value for her ketubah.

In modern times, Orthodox and many Conservative rabbis maintain the position that only a man can act as a kohen, and that a daughter of a kohen is recognized as a bat kohen only in those limited ways that have been identified in the past. Accordingly, in Orthodox Judaism only men can perform the Priestly Blessing and receive the first aliyah during the public Torah reading.

However, some Conservative rabbis give the kohen's daughter equal priestly status to a (male) kohen. As a result, some Conservative synagogues permit a kohen's daughter to perform the Priestly Blessing and the Pidyon HaBen ceremony, and to receive the first aliyah during the Torah reading.

Because most Reform and Reconstructionist temples have abolished traditional tribal distinctions, roles, and identities on grounds of egalitarianism, a special status for a bat kohen has very little significance in these movements.

Genetics

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Since the Y chromosome is inherited only from one's father (biological females have no Y chromosome), all direct male lineages share a common haplotype. Thus, if kohanim share a direct male lineage to Aaron, one would expect to see a high level of commonality among their Y chromosomes.

Since 1997, a number of genetic studies have been done on this topic, using testing data from across sectors of the Jewish and non-Jewish populations. The results of these studies have been interpreted by various parties as either confirming or disproving the traditions of uniform descent.[citation needed]

Surnames

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As both kohen status and (in many societies) last names are patrilineal, there is often a relationship between the two. But this is not always the case: although descendants of kohanim often bear surnames that reflect their genealogy, many families with the surname Cohen (or a variation) are not kohanim, nor even Jewish. Conversely, many kohanim do not have Cohen as a surname.[57]

Names often associated with kohanim include:

  • Cohen, also spelled Kahn
  • Katz (Hebrew abbreviation of Kohen Tzedeq, "priest of justice"/"authentic priest")
  • Maze, Mazo, Mazer (acronym of the Hebrew phrase mi zera Aharon hakohen, meaning "from the seed of Aaron the priest")
  • Azoulay (acronym of the Hebrew phrase ishah zonah ve'challelah lo yikachu, meaning "a foreign [non-Israelite woman] or divorced [Israelite woman] shall not he take": a prohibition binding on kohanim, Leviticus 21:7)
  • Kahane (Aramaic for kohen[58])

In contemporary Israel, "Moshe Cohen" is the equivalent of "John Smith" in English-speaking countries – i.e., proverbially the most common of names.[citation needed]

Outside Judaism

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According to the Church of Jesus Christ of Latter-day Saints, either "literal descendants of Aaron", or worthy Melchizedek priesthood holders have the legal right to constitute the Presiding Bishopric under the authority of the First Presidency (Section 68:16–20). To date, all men who have served on the Presiding Bishopric have been Melchizedek priesthood holders, and none have been publicly identified as descendants of Aaron. See also Mormonism and Judaism.

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The positioning of the kohen's hands during the Priestly Blessing was Leonard Nimoy's inspiration for Mr. Spock's Vulcan salute in the original Star Trek television series. Nimoy, raised an Orthodox Jew (but not a kohen), used the salute when saying, "Live long and prosper."

The Priestly Blessing was used by Leonard Cohen in his farewell blessing during "Whither Thou Goest", the closing song on his concerts. Leonard Cohen himself was from a kohen family. He also used the drawing of the Priestly Blessing as one of his logos.

See also

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References

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Bibliography

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Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
A Kohen (Hebrew: כֹּהֵן, pl. kohanim), also spelled Cohen, is a member of the hereditary Jewish priesthood, consisting of patrilineal descendants of , the brother of and the first high priest appointed by in the . These priests were designated to serve as intermediaries between and the Jewish people, primarily through ritual duties in the and later the Temples in . The kohen status is passed exclusively from father to son, forming a distinct within the tribe of Levi, and it endures today despite the absence of the Temple, influencing synagogue practices and marital laws. The biblical origins of the kohanim trace back to the , where and his sons were consecrated as priests following the ' sin of the , replacing the original plan for firstborn sons of all to serve in that capacity. God selected the Levites, and specifically Aaron's lineage, for this role due to their loyalty during the crisis, as described in Exodus 32:25–29. This priesthood was formalized with detailed laws in Leviticus, emphasizing purity, vestments, and anointing rituals to enable their sacred service. In the periods when the and Temples stood, kohanim held central responsibilities in Jewish worship, including offering animal sacrifices, maintaining the sacred vessels, and teaching laws to the people. The , or Kohen Gadol, oversaw the most solemn rites, such as entering the on to atone for the nation's sins, as outlined in Leviticus 16. Kohanim also received portions of sacrificial offerings as sustenance, underscoring their dependence on the community rather than land ownership, in line with Numbers 18:8–20. Following the destruction of the Second Temple by the Romans in 70 CE, the sacrificial system ceased, but the kohen's ritual purity and privileges persisted in rabbinic Judaism. Today, kohanim recite the Priestly Blessing (Birkat Kohanim) during synagogue services on festivals and other occasions, as derived from Numbers 6:22–27. They are subject to restrictions, such as prohibitions on marrying divorcees or converts (Leviticus 21:7) and contact with the dead (Numbers 19:14), to preserve their sanctity. Genetic studies have identified a common Y-chromosome marker among many self-identified kohanim, supporting the tradition of direct descent from Aaron.

Origins and Terminology

Biblical foundations

The kohanim, or priests, originate in the Hebrew Bible following the Israelites' sin of the Golden Calf, when the Levites demonstrated loyalty by rallying to Moses, leading God to select them in place of the firstborn sons for sacred service (Exodus 32:25–29; Numbers 3:12–13). Aaron, from the tribe of Levi and brother of Moses, along with his sons, was designated as a hereditary class to serve as intermediaries between God and the Israelites. This designation establishes the kohanim as the sole authorized performers of sacrificial rites in the Tabernacle, emphasizing their sacred role in maintaining ritual purity and facilitating divine worship. The appointment of and his sons—Nadab, Abihu, , and —is explicitly commanded in Exodus 28:1: "And you shall bring near to you your brother, and his sons with him, from among the children of Israel, to serve Me as priests—, Nadab and Abihu, and , sons of ." Chapters 28–29 of Exodus detail the preparation for this role, including the fabrication of priestly garments symbolizing their consecration, while Leviticus 8–9 records the fulfillment of these instructions through ceremonies. The process begins with ritual washing and vesting, followed by sacrifices to atone for the priests and the people. Central to their induction is the seven-day ordination in Leviticus 8, during which Aaron and his sons are anointed with sacred oil poured upon Aaron's head and sprinkled on their garments, signifying divine empowerment. They remain confined to the Tabernacle entrance, with daily offerings of a ram and bread to sanctify them before entering service on the eighth day. This ritual underscores the kohanim's perpetual hereditary status, passed to Aaron's male descendants. Numbers 18:1–7 delineates the kohanim's exclusive sacrificial duties, warning Aaron and his lineage to bear responsibility for the sanctuary's sanctity: "And the Lord said to Aaron, You and your sons and your father's house with you shall bear the iniquity of the sanctuary, and you and your sons with you shall bear the iniquity of your priesthood." Only they may approach the altar and sacred vessels, while other Levites are assigned supportive roles such as transportation and guarding, highlighting the kohanim's elevated position within the tribe. Deuteronomy 18:1–5 reinforces their inheritance and obligations, stating that the priests-Levites, as Aaron's descendants, receive no territorial allotment but subsist on offerings: "The priests the Levites, all the , shall have no portion or with ; they may eat of the burnt offerings of the , and of His portion." This provision ensures their dedication to ministering at the chosen , standing to serve and bless in God's name across generations. The Hebrew term kohen (כֹּהֵן) is derived from the triconsonantal root כ-ה-ן (k-h-n), signifying "to minister," "to serve," or "to officiate" in a religious capacity. The noun form kohen, denoting a responsible for sacred duties, occurs approximately 750 times throughout the . This root exhibits cognates across other , reflecting a broader Northwest Semitic linguistic tradition for terms related to priesthood. In , khn refers to a performing functions. The kāhin (كاهن) denotes a soothsayer or , often associated with and prophetic roles. In , the term appears as kahn or kahen, maintaining the sense of priestly ministration. Variants in Jewish nomenclature include "Cahana," a surname derived from the Aramaic/Hebrew kahana meaning "priest." The , the ancient Greek translation of the Hebrew Scriptures, consistently renders kohen as hiereus (ἱερεύς), the standard Greek word for . Related terminology includes kohen gadol (כהן גדול), meaning "great priest" or High Priest, designating the principal leader of the priesthood. The broader category of Levite (לוי) encompasses members of the tribe of Levi, with kohanim forming the Aaronic subset dedicated to priestly service. The terumah (תרומה), a portion of produce or tithe allocated for priestly sustenance, derives from the root ר-ו-ם (r-w-m), "to raise" or "elevate," symbolizing the uplifted support provided to the kohanim.

Historical Overview

Ancient priesthood

The kohanim, the hereditary priestly class in ancient , trace their origins to the biblical account of in the 13th century BCE, when , brother of , was appointed as the first by divine command. Aaron's descendants, known as the Aaronide or Zadokite lineage in later periods, were set apart for sacred service, distinguishing them from other Levites. Prior to the establishment of the monarchy, figures like Eli served as priests at the sanctuary in Shiloh, overseeing early cultic practices during the period of the judges. During the monarchic period, the kohanim's role solidified under kings and around the 10th century BCE, with emerging as a key figure who became after replacing the house of Eli. 's family dominated the priesthood, supporting the centralization of worship in following the construction of the First Temple circa 950 BCE. In the First Temple period (c. 950–586 BCE), this centralization intensified under reforms by King in the late 7th century BCE, who purged local shrines and reinforced 's sole cultic authority, elevating the status of the Jerusalemite kohanim. The Babylonian conquest in 586 BCE led to the destruction of the First Temple and the of many kohanim to , disrupting their institutional roles. Upon the return from starting in 538 BCE, the priesthood was reestablished with the rebuilding of the Temple in 516 BCE. Ezra, a kohen and of Aaronide descent, played a pivotal role in reforms around 458 BCE, enforcing observance, purifying the community from intermarriages, and reinstigating priestly genealogies and duties. In the Second Temple era (516 BCE–70 CE), the kohanim regained prominence under Persian, Hellenistic, and Roman rule, with the high priesthood becoming a political office. The (167–37 BCE), a priestly family, led the against Seleucid oppression and assumed both kingship and high priesthood, as exemplified by (r. 134–104 BCE), who expanded Judean territory while serving as high priest-king. This period ended with increasing Roman interference, culminating in the Temple's destruction by the Romans in 70 CE, which marked the cessation of the ancient sacrificial system.

Post-Temple evolution

Following the destruction of the Second Temple in 70 CE, the kohanic priesthood transitioned from its central role in sacrificial worship to a more symbolic and spiritual function within emerging . Rabbi , a key figure in this shift, escaped the Roman siege of Jerusalem and established an academy at (Jamnia), where he emphasized , prayer, and ethical observance as substitutes for Temple rituals, thereby preserving Jewish continuity without priestly sacrifices. This adaptation marginalized the kohanim's practical authority, as leadership increasingly passed to rabbis, though kohanim retained hereditary prestige and certain communal honors. The , compiled around 200 CE under Rabbi Judah the Prince, codified post-Temple Jewish law, including kohanic regulations such as marriage restrictions and ritual purity, to maintain their distinct status amid diaspora life. Tractate Middot, for instance, meticulously describes the Temple's architecture and layout, serving as a mnemonic tool to perpetuate kohanic knowledge and Temple memory for future generations. Key early events underscored lingering hopes for restoration: At the rabbinic academy in (c. 90 CE), scholars, including priestly descendants, debated scriptural and other religious issues, helping to adapt Jewish practice to the Temple-less era. Similarly, the (132–135 CE) saw rebels appoint as and mint coins depicting Temple symbols, in a failed bid to revive sacrificial service and priestly roles. In the medieval period, kohanic status remained hereditary and revered, as affirmed by in his (c. 1180 CE), where he details the laws of priests in the "Book of Avodah," tracing descent from and outlining ongoing obligations like redemption of firstborns, even without a Temple. However, events like the 1492 expulsion from disrupted Sephardic kohanic communities, scattering families to the , , and , where they integrated into new locales while preserving lineage through oral and written records. During the early (16th–18th centuries), kohanim contributed to Jewish intellectual life, serving as scholars and leaders in yeshivas across and the Ottoman lands, where their status enhanced communal respect without Temple duties. In the , as unfolded in Europe, debates arose over retaining priestly distinctions like kohanic privileges in civil contexts, with reformers questioning their relevance in secular societies while traditionalists upheld them as markers of . The 20th century brought profound challenges: (1933–1945) devastated kohanic lineages, killing an estimated one-third of all and obliterating genealogical records in , where many kohanim resided, thus complicating verification of descent. In contemporary times, recognizes kohanim as under the (1950), granting them immediate citizenship and rights alongside other , while their status informs symbolic roles in state ceremonies and religious life.

Priestly Roles in Antiquity

Temple duties and laws

In the Temple era, kohanim held primary responsibility for performing korbanot, the sacrificial offerings, on , encompassing burnt offerings, peace offerings, sin offerings, guilt offerings, and grain offerings as prescribed in the . These rituals involved slaughtering animals, sprinkling blood, arranging portions on the fire, and ensuring the offerings were consumed according to divine specifications to atone for sins, express gratitude, or fulfill vows. Additionally, kohanim managed the burning of on the golden within the sanctuary, with the uniquely entering the once annually on to perform this rite. Kohanim were bound by stringent purity laws to maintain ritual cleanliness for service, foremost among them the prohibition against contact with corpses, known as tum'at met, which rendered one impure and disqualified from Temple duties. To restore purity after unavoidable impurity, a complex rite involving the ashes of a red heifer was required, followed by ritual immersion in a mikveh. Before entering the Temple or handling sacred items, kohanim underwent immersion and wore designated vestments to symbolize and sustain their holy status. Economically, kohanim received terumah, a priestly from produce, and specific portions of sacrificial offerings such as and right of certain animals, as their allotted share for service. In exchange, they held no territorial inheritance in the , relying entirely on these sacred dues to support themselves and their families, underscoring their dedication to spiritual rather than material pursuits. Several prohibitions governed kohen conduct during service to preserve sanctity, including a strict ban on consuming wine or intoxicants, which could impair judgment and lead to improper rituals. Offerings with defects, such as blindness, lameness, or skin blemishes in animals, were unacceptable, ensuring only unblemished sacrifices approached the altar. Beyond rituals, kohanim served an instructional role, teaching the laws and Torah to the people of Israel, as affirmed in the blessing to Levi: "They shall teach Jacob Your ordinances and Israel Your Torah." This duty positioned them as spiritual guides, though not as full-time educators, integrating teaching with their priestly obligations.

Vestments and qualifications

The priestly vestments, known as the Bigdei Kehuna, were prescribed in the Torah for kohanim to wear during Temple service, ensuring they performed their duties with dignity and sanctity. For regular kohanim, these consisted of four garments: the ketonet, a full-length tunic made of fine white linen extending from the shoulders to the heels; the michnasayim, linen breeches reaching the knees to cover the body modestly; the avnet, a long sash woven from linen and threads of red, purple, and blue wool, tied around the waist; and the migba'at or mitznefet, a turban of white linen wrapped around the head. These items were crafted primarily from pure linen, symbolizing moral and ritual purity, and the Torah specifies that the garments were to be made "for glory and for beauty" to honor the divine service. The donned these four basic garments along with four additional ones: the (choshen), , (me'il), and (tzitz). Incorporating gold threads, these extra vestments symbolized a heightened connection to the divine, while the bells on the hem of the served to announce the 's presence in the , as his approach without sound could indicate peril. Service without the proper vestments invalidated the priestly duties. Qualifications for kohen service demanded unblemished physical condition to uphold the Temple's holiness, excluding those with defects such as blindness, lameness, a disfigured face or limb, hunchback, , or eye impairment, as outlined in Leviticus 21:16–24. These criteria prevented any profanation of the sacred space through imperfection. Moral purity was equally essential, requiring kohanim to avoid and grave sins that compromised their consecrated status. Permanent disqualifications included a regular kohen's to a divorcee, as prohibited in Leviticus 21:7 (though widows were permitted); the was required to marry only a virgin (Leviticus 21:13–14). Similarly, descent from foreign lineage beyond full conversion barred eligibility, since priesthood was exclusively hereditary through Aaron's male line. Temporary disqualifications arose from ritual impurity, such as contact with a corpse (except for like parents or siblings), which rendered a kohen unfit until undergoing purification rites over seven days. Kohanim prepared for service through apprenticeship under senior priests, typically starting around age 25 for initial training, with full active duty beginning at age 30 and continuing until 50, in line with Levitical service guidelines.

High Priest

The Kohen Gadol, or , held the supreme position within the Aaronic priesthood, serving as the hereditary leader descended directly from , the brother of , as established in the biblical account of the transition of authority from Aaron to his son . This lineage ensured the office's continuity, with the High Priest selected from qualified descendants in Aaron's line to maintain ritual purity and divine favor. However, during the late , political influences often disrupted this tradition; for instance, appointed seven high priests during his reign from 37 BCE to 4 CE, frequently deposing incumbents to consolidate power and favor Roman interests. Ideally, the role was intended for lifetime tenure, symbolizing stability and the High Priest's enduring role as the primary intermediary between God and the people of , but in practice, terms shortened due to external pressures, with some serving only a year or less. The High Priest's exclusive duties underscored his unique spiritual authority, most notably his sole permission to enter the —the innermost sanctum of the or Temple—once a year on to perform rituals for the nation's sins. This act, detailed in Leviticus, involved sprinkling blood on the mercy seat to purify the sanctuary and the people, a responsibility no other could undertake. Additionally, he wore the Tzitz, a golden plate affixed to his turban forehead inscribed with "Holy to the Lord," which symbolically bore the iniquities associated with the sacred gifts offered by , ensuring their acceptance before God. Among his distinctive vestments, the donned the of judgment, a square pouch set with twelve precious gems, each engraved with the name of one of the , positioned over his heart during service to represent the unity and burdens of the nation. Embedded within this were the , sacred objects used for divine to seek God's guidance on critical matters facing the community. Historically, prominent figures like (high priest from 6 to 15 CE) and his son-in-law (18 to 36 CE) exemplified the office's intersection with Roman politics in the first century CE, as referenced in the accounts of their involvement in religious and judicial proceedings. The last High Priest before the Temple's destruction in 70 CE was Phannias ben Samuel, appointed amid the chaos of the First Jewish-Roman War and serving from 67 to 70 CE, as recorded by the historian , marking the abrupt end of the priestly institution with the fall of .

Service divisions

The Mishmarot system organized the kohanim into twenty-four divisions, or mishmarot, for the performance of Temple duties, as established by King David according to 1 Chronicles 24:1–19. Each division served for one week at a time, twice per year, covering the non-festival weeks of the to ensure continuous Temple maintenance and worship. This rotation aimed to distribute responsibilities equitably among the eligible kohanim, preventing exhaustion from constant service while promoting fairness in participation. Selection for service within the mishmarot was determined by drawing lots among qualified kohanim, as described in 1 Chronicles 24:5, to avoid bias and ensure impartiality. Each mishmar further subdivided into smaller groups known as batei avot (houses of the fathers), which handled specific tasks such as offerings, gatekeeping, or chamber duties during their assigned week. The cycle of rotations typically commenced around and continued through the following year, with shifts changing on the ; however, all divisions participated collectively during major festivals like , requiring additional service beyond the regular schedule. Following the Babylonian exile, the mishmarot system persisted in the Second Temple period, as evidenced by the listings in 12:1–26, which enumerate the heads of the priestly families corresponding to the twenty-four divisions. These divisions became associated with specific geographic clans and settlements, linking priestly service to regional communities across . This organizational framework underscored the collective nature of kohen responsibilities, maintaining ritual continuity and communal equity in Temple operations.

Modern Religious Practices

Synagogue participation

In contemporary synagogue services, kohanim hold specific honors derived from post-Temple rabbinic traditions that substitute for their ancient Temple roles. The primary distinction is in the order of aliyot, the honors of being called to recite blessings before and after sections of the Torah reading. According to halachic codification, a kohen receives the first aliyah during Torah readings on Shabbat, festivals, Mondays, and Thursdays, followed by a Levite for the second aliyah and then an Israelite. This practice stems from the Talmudic enactment in Gittin 59b, which establishes the sequence of kohen, Levite, and Israelite for public Torah readings as a means of honoring the priestly class after the destruction of the Second Temple. In many traditional Orthodox synagogues, kohanim are customarily seated in the front rows near the to enable quick access for their honors and to maintain a sense of sanctity. The , or synagogue functionary, announces the kohen's with the phrase "Ya'amod ha-Kohen" (the kohen shall arise), followed by the honoree's name, signaling their approach to the bimah. However, a kohen must refrain from receiving an aliyah if ritually impure, such as after attending a without subsequent purification, to uphold standards of holiness; in such cases, the honor passes to an Israelite. Observance of these privileges varies across Jewish denominations. Orthodox communities adhere strictly to the hierarchical order, viewing it as a fulfillment of the biblical command to sanctify the kohanim. In , the practice is optional, with many congregations maintaining the traditional sequence while others adapt it for inclusivity, such as allowing women or non-hereditary honorees. synagogues emphasize and generally eliminate hereditary priorities, assigning aliyot based on merit, occasion, or random selection without regard to kohen status. Following the , kohanim may recite the in certain services, further highlighting their role.

Blessings and ceremonies

In modern Jewish practice, the , or Birkat Kohanim, serves as a key ceremonial role for kohanim, involving the recitation of the threefold benediction outlined in Numbers 6:24–26: "May the Lord bless you and keep you; may the Lord make His face shine upon you and be gracious to you; may the Lord turn His face toward you and grant you peace" ("Yevarechecha Adonai v'yishmerecha..."). This blessing is recited aloud during the Musaf service daily in and on festivals in the , reflecting a tradition rooted in the (Ta'anit 26b), which describes its regular performance in ancient Temple times. The procedure for Birkat Kohanim, known as duchaning, requires kohanim to ascend the bimah after handwashing, cover their hands and faces with the fringes of their , and raise their hands with fingers spread in a specific formation symbolizing divine channels. They chant the blessing in a loud but measured voice, often repeating after the chazzan, while the congregation averts their eyes to focus inwardly and avoid gazing at the kohanim's hands. The kohen performs this act as a conduit for divine favor without deriving personal benefit, emphasizing its selfless nature as a fulfillment of priestly duty. Variations in recitation exist across communities: Sephardi traditions typically involve full aloud performance more frequently, including daily in many Israeli and settings, while some Ashkenazi communities limit it to holidays or or recite it silently to maintain solemnity. Another significant ceremony is , the redemption of the firstborn son, mandated by Numbers 18:15–16, where the father symbolically redeems his son from priestly service by presenting five silver shekels—equivalent to about 100 grams of silver (approximately $170 as of November 2025)—to a kohen on the child's 30th day of life. This ritual underscores the historical consecration of firstborns and the kohanim's role as recipients on behalf of the Temple. Kohanim also participate in weddings through an optional recitation of the for the couple, often under the or during the , enhancing the ceremony's sanctity. In funerals, however, kohanim avoid approaching the deceased and generally refrain from direct participation, such as delivering eulogies in close proximity, while permitted to attend and participate from a distance for ; they avoid services for non-immediate relatives to prevent ritual impurity from contact with the dead (tum'at met), though they are permitted and obligated to attend for close relatives like parents or children.

Familial obligations and restrictions

Kohanim are subject to specific marital restrictions under , prohibiting marriage to a divorcee (gerushah), a convert (gioret), or a woman who has undergone chalitzah (chalutzah). These rules derive from Leviticus 21:7, which forbids a kohen from taking a zonah (harlot) or chalalah (defiled woman) as a wife, with rabbinic authorities extending the to the aforementioned categories to preserve the priestly lineage's sanctity. The in Yevamot 59a and Kiddushin 78a elaborates on these extensions, emphasizing that such unions would profane the kohen's status. Children born from these invalid marriages are classified as chalal (profaned), losing the full priestly status and associated privileges, though they may retain certain obligations under law. According to Kiddushin 77a, such offspring cannot perform priestly duties or receive the honors accorded to kohanim, as the disqualification stems from the mother's status. In severe cases, if the union involves , the child may be deemed a , facing further marital restrictions, though this is less common in the contexts of or conversion. Ritual purity requirements remain a key familial obligation for kohanim, mandating avoidance of contact or proximity to the dead to prevent tum'at met (impurity from a corpse), as prescribed in Leviticus 21:1–4. This extends to contemporary settings, where kohanim generally refrain from entering cemeteries or areas with graves, except when burying immediate relatives such as a , , , , brother, , or . The (Yoreh De'ah 373) specifies that kohanim must maintain at least four cubits (approximately six feet) from graves if entry is unavoidable, and in , accommodations like elevated paths on the or fenced sections in cemeteries enable kohanim to visit without violating purity laws. The kohen status is inherited exclusively through the paternal line, passing from father to son regardless of the mother's background, as established in traditional . This patrilineal transmission underscores the tribal affiliation's connection to Aaron's descendants, with the maternal line determining but not priestly rank. In modern times, verifying kohen status faces challenges, including reliance on family tradition amid disrupted lineages from historical upheavals, though Y-chromosomal DNA testing revealing the Cohen Modal Haplotype provides suggestive evidence but lacks halakhic authority for confirmation. Reform Judaism largely rejects these traditional obligations and restrictions, viewing them as outdated and not binding on contemporary practice.

Preparation for Temple Service

In recent years, organizations such as the Mamlechet Kohanim and the Temple Institute have initiated efforts within the Kohen and Levite communities to prepare for potential future Temple service. The Mamlechet Kohanim operates a basic training course for kohanim, utilizing life-sized replicas of Temple vessels, including an altar and menorah, and incorporates practical workshops led by specialists, with the aim of expanding participant numbers and enhancing professional preparedness for traditional priestly functions. The Temple Institute conducts extensive research and training programs, such as the Nezer HaKodesh Institute for Kohanic studies, and has produced practical materials including reproductions of sacred vessels, priestly garments, and ritual simulations (e.g., red heifer preparations), to develop functional contemporary identities for these historical roles.

Female Kohanim and Inheritance

Status of bat kohen

In Jewish law, the priestly status of a kohen is transmitted exclusively through patrilineal descent, meaning a bat kohen—daughter of a kohen—does not inherit or confer this status upon her own children, regardless of their father's lineage. This patrilineal principle ensures that only sons of kohanim maintain the full ritual obligations and privileges associated with the priesthood in subsequent generations. Despite lacking the full priestly status, an unmarried bat kohen retains certain privileges connected to her father's role, most notably the right to consume terumah, the priestly portion of produce tithed for kohanim, provided she resides in her father's household and maintains ritual purity. This entitlement derives from Talmudic sources, such as the in Yevamot, which extends terumah consumption to eligible family members of kohanim living under their roof. However, upon marriage to a non-kohen, she forfeits this right, as her new household affiliation shifts her status away from the priestly domain, though she may resume it if the marriage ends and she returns to her father's home. Regarding marriage, a bat kohen faces no Torah-mandated restrictions beyond those applicable to all Jewish women, but rabbinic traditions encourage her to wed a or to preserve familial alignment with priestly and Levitical purity laws and to sustain indirect access to related privileges. For instance, Midrashic texts and later authorities, including , highlight preferences for such unions to avoid diluting the priestly lineage's sanctity, while still permitting to an Israelite; additionally, her (marriage contract) stipulates a higher monetary for her husband, reflecting her elevated familial status. In mourning practices, a bat kohen holds a distinct position: while kohanim are generally prohibited from delivering eulogies to avoid ritual impurity, she may eulogize her father as a filial duty, underscoring her retained connection to the priestly line without imposing the full restrictions on her. Conversely, kohanim do not eulogize their daughters, aligning with broader rules limiting their involvement in rites for non-immediate defilement cases. Historical figures illustrate the bat kohen's role in tradition; for example, , sister of the first kohen, embodies the archetype as a daughter within the nascent priestly family, influencing narratives of female agency in biblical priestly contexts, while medieval commentaries elaborate on her privileges, such as enhanced marital protections, to affirm her semi-sanctified standing. In contemporary , Orthodox communities uphold these distinctions, recognizing bat kohen for privileges such as terumah consumption under specific conditions and enhanced amounts, while barring her from priestly s reserved for males. Egalitarian movements, however, often disregard gender-based tribal statuses entirely, treating bat kohen equivalently to other women in ritual participation to promote full equality.

Privileges and limitations

A bat kohen who is unmarried and resides in her father's household is entitled to consume terumah (priestly tithes) and (sacred offerings), as outlined in Leviticus 22:12-13. Upon marriage to a non-kohen, she forfeits this privilege, as her new household affiliation shifts her ritual status, preventing access to these sacred foods. In ritual practice, a bat kohen is prohibited from performing the (duchenen), a duty reserved exclusively for male kohanim of ritual purity, reflecting the patrilineal and gendered nature of kohen responsibilities. Similarly, traditional custom bars her from receiving the during , to preserve the honor designated for kohanim, though she may receive priority for other communal honors such as certain roles or collections of priestly gifts like the foreleg, cheeks, and maw from animals. Upon divorce or widowhood, a bat kohen benefits from enhanced protections under halakhah, including the right to return to her father's home and resume eating terumah. However, remarriage to a non-kohen introduces complications, as it permanently disqualifies her from priestly privileges and imposes ongoing marital restrictions derived from her original status. Historically, bat kohen status carried social prestige that influenced matchmaking, with families often favoring such unions for their perceived spiritual elevation, though this led to selective marital expectations. Denominational variations affect these privileges significantly. In , bat kohen status is recognized patrilineally for aliyot, allowing her the first Torah honor if tribal distinctions are observed, and some congregations permit her to perform the , as affirmed by the Committee on Jewish Law and Standards in 1989. , however, eliminates kohen-related privileges entirely, viewing them as incompatible with egalitarian principles and not binding in modern practice.

Genetic and Demographic Insights

Y-chromosomal research

Y-chromosomal research on kohanim has primarily focused on the Cohen Modal Haplotype (CMH), a specific set of markers on the associated with patrilineal descent. In 1997, a seminal study by Skorecki et al. identified the CMH, defined by 6 markers, at a frequency of approximately 50% among self-identified kohanim compared to about 14% in non-kohanim. Subsequent studies, including et al. (2009), extended the CMH to 12 markers, placed it within the (), and reported a refined frequency of 46.1% among kohanim. This finding suggested a common paternal ancestor for a significant portion of kohanim, potentially tracing back to the biblical . The 2009 analysis by Behar et al. confirmed its placement within the J-P58 subclade, predominant in both Ashkenazi and non-Ashkenazi kohanim, accounting for approximately 50% of sampled kohanim Y chromosomes. Further examination by Hammer and colleagues in the same study revealed that while the CMH is enriched in kohanim, it is not exclusive to them, appearing at lower frequencies in other Jewish and non-Jewish populations, indicating broader regional origins in the Near East. Despite these associations, limitations are evident. Not all self-identified kohanim carry the CMH, with absence attributed to genetic admixture, historical conversions, or false claims of descent, as only about 50-60% exhibit the haplotype in expanded samples. Divergence time estimates for the CMH lineage, based on STR mutation rates, place the common ancestor around 3,000 years ago (3,190 ± 1,090 years), roughly aligning with the traditional timeline for Aaron in the 13th century BCE, though such estimates carry uncertainties due to mutation rate variability. Recent post-2020 research has incorporated to contextualize these findings. Studies of Levantine remains, such as Agranat-Tamir et al. (2020), identified J1 continuity in ancient populations from sites like Megiddo and . A 2021 analysis by Sahakyan et al. further traced J1-M267 diffusion, noting its presence in the and ongoing debates about founder effects and bottlenecks that may have amplified the CMH frequency through population expansions and contractions. Building on these foundations, a 2025 preprint by Lipson et al. generated 104 new Big Y-700 sequences from rigorously documented Cohanim spanning 20 diaspora origins, incorporated 215 legacy samples re-typed for diagnostic SNPs, and built phylogenies and branch TMRCAs on the FTDNA and YFull backbones. A branch qualified as “Cohen” (CB) if it included ≥5 men and ≥50% of branch members self-identified as Cohanim. The study catalogued nine such Cohen branches (CB-01 to CB-09), numbered based on antiquity of SNP-block coalescence, providing higher-resolution insights into Cohanim lineages and advancing earlier work like Skorecki (1997) and Behar (2009) by identifying multiple priestly lineages rather than a single modal haplotype. Corresponding to Hammer et al. (2009), which reported the CMH in J-P58—most, but critically not all of which maps onto CB-01—at a frequency of 46.1% across a large sample of Cohanim, with roughly equivalent frequencies among Ashkenazi and non-Ashkenazi Cohanim, Lipson et al.'s independent sample reflects a rate of 45% overall, 63% among Ashkenazi Cohanim (somewhat but not significantly higher than Hammer et al.'s rate of 52%), and 33% among non-Ashkenazi Cohanim, ranging in prevalence from 2 of 13 Iranian Jewish individuals to 4 of 4 Moroccan Jewish individuals. The first Cohen-associated branch, CB-01, is defined by the Y-SNP terminal J-ZS222 and its associated block of 25 SNPs, a sub-branch of the broadly Near Eastern haplogroup J-P58 likely associated with early Semitic-speaking populations; an overwhelming majority of nearly all of its branches consist of Jewish individuals with traditions of priestly descent. To date, CB-01 has been found among Ashkenazi, Moroccan, Algerian, Tunisian, Greek (both Sephardic and Romaniote), Bulgarian, Turkish, Syrian, Iraqi, Iranian, Mountain (i.e. Dagestani), Afghan, and Yemenite Jews, as well as currently non-Jewish individuals of Hispanic/Iberian, Southern Italian, Pontic Greek, Lebanese Christian, Palestinian Christian, Moroccan, Iraqi, Ahwazi, and Yemeni Arab origin but ultimately Jewish patrilineal descent. CB-01’s closest upstream connection is to a German Jewish individual with no priestly tradition, estimated to date to c. 2150 BCE. Several phylogenetic levels above, defined by J-ZS241 (dating to c. 2600 BCE), CB-01 shares a branch with individuals from Bronze and Iron Age Megiddo in Israel, a genetically East Mediterranean individual from Imperial-era Rome, and a range of modern Middle Eastern and European individuals; even more proximally, it shares connections with a Bronze Age Sidon genome from Lebanon (c. 1700 BCE). CB-01 is the largest (∼45% of all Cohanim sampled), the most ancient (TMRCA 833 BCE; 95% confidence interval 1289 BCE to 440 BCE), and the only lineage present in every major Jewish community; its internal topology shows explosive branching between 700 and 300 BCE, stasis through the Roman-Byzantine era, and renewed expansion after 800 CE, mirroring known demographic pulses. CB-01, as currently defined, splits at its top level (c. 833 BCE) into three sub-branches: J-FT246135, J-Z18271, and a thus far-unnamed branch defined by a single Brazilian individual of Portuguese origin. CB-01’s largest, most widespread sub-branch, J-Z18271, consists of 11 sub-branches, 9 of which have a clear Jewish affinity, coalescing to a common ancestor c. 689 BCE. CB-01’s other named, well-characterized sub-branch, J-FT246135, consists of four sub-branches, two of which have a clear Jewish affinity, coalescing to a common ancestor c. 682 BCE. Notably, the first two of these branches coalesce to nearly the same date, c. 682 BCE and c. 689 BCE, respectively. At c. 682 BCE, J-FT246135 splits into 4 distinct primary-level branches, two of which are found in Iraqi and Syrian Cohanim, with two others represented by non-Jewish individuals (J-Z11314 is found in a Kuwaiti individual and a published sample from a Turkmen individual; a basal individual is of Ahwazi Arab origin from Southwestern Iran). In more extreme cases, J-Z18271 splits c. 689 BCE into 11 known primary descendant branches. Nine of these 11 branches exclusively or mostly comprise Jewish individuals from across the Jewish Diaspora (with 8 of 9 associated with Cohen status); the remaining two have only yet been identified in Southern European and Near Eastern populations. Traditional Jewish understanding identifies kohanim as a subset of the Tribe of Levi, one of the 12 Israelite tribes descended from the sons of the patriarch Jacob (c. mid-2nd millennium BCE). However, CB-01, identifiable at its top level by priestly affiliation, lacks close connections to Jewish non-kohen branches, indicating it does not represent merely a subgroup within broader Jewish variation. Combined with the diversity of Middle Eastern-origin Y-DNA branches among modern Jews—often unrelated phylogenetically for several thousand years and spanning different haplogroups—this suggests the patrilineal origins of ancient Israelites were genetically heterogeneous. Conversely, the characterization of CB-01 provides strong circumstantial support for the traditional history of the Jewish priesthood from at least c. 833 BCE onward and the authenticity of priestly descent traditions across the Jewish Diaspora. In the 9th century BCE, Israelite ancestors of Jews inhabited the northern Kingdom of Israel and the southern Kingdom of Judah, centered on Jerusalem and the First Temple; the earliest common ancestor of CB-01 may trace to this era within the priestly class of one of these kingdoms. The second Cohen-associated branch, CB-02, is defined by the terminal Y-SNP E-BY8508 and its associated block of 11 SNPs, a sub-branch of the broadly Northeast African and Near Eastern haplogroup E-V12. For this study, the E-BY8508 block represents the most relevant phylogenetic level, as the majority of its identified members are Jewish individuals with traditions of priestly descent. For CB-02, the currently estimated TMRCA value is 697 BCE (95% confidence interval 1555 BCE to 21 BCE). To date, CB-02 has been found in Bukharian, Yemenite, Turkish, and Syrian Cohanim, as well as Hispanic individuals with no present tradition of Jewish descent. CB-02 (TMRCA ≈700 BCE) and CB-03 (≈550 BCE) trace to Iron- or late Classical-period Judea but are geographically narrower, while CB-04, defined by the terminal SNP J-Y142210 within J-P58 with an estimated TMRCA of 1 BCE (95% CI 665 BCE to 521 CE), is associated with priestly traditions among individuals from Iraq, Iran, and Afghanistan, as well as one Armenian-linked case clustering in Jewish variation; CB-04–CB-07 are Near-Eastern clades whose priestly status may have crystallized 0–1000 CE, and CB-05 (defined by J-Y33799), CB-08, and CB-09 appear to derive from Mediterranean host populations without pre-common era priestly identification. Twenty percent of Cohanim fall outside any current CB, indicating additional, rarer lineages remain to be characterized. The research also reconstructed the geographic dispersal of these branches across Jewish Diaspora communities, including Ashkenazi, Yemenite, and others, and proposed a stable SNP-block nomenclature (CB-01 to CB-09) for future studies. Overall, Y-chromosomal evidence bolsters the concept of patrilineal transmission among kohanim but does not conclusively prove direct descent from , as the CMH likely represents a broader Semitic paternal lineage. This research has practical applications in , aiding individuals in verifying kohen status through commercial DNA testing focused on Y-STR and SNP markers.

Common surnames

Common surnames among Kohanim reflect adaptations of the Hebrew term "kohen" () across communities, influenced by local languages, phonetics, and historical naming practices. In Ashkenazi Jewish communities of , prominent variants include , the direct , as well as Kohn, , Kahane, Kagan, and Kogan, where the "h" sound often shifts to "g" in Slavic-influenced regions like . Another key Ashkenazi form is Katz, an for "Kohen Tzedek" (righteous ), commonly used to denote priestly lineage. Kaplan emerged as a translation equivalent, deriving from the German or Polish word for "" (Kaplan or kapłan), linking back to the priestly role of a kohen. Among Sephardi and Mizrahi Jews, surnames such as Coen and Kohen maintain closer fidelity to the original Hebrew, appearing in communities from , , , and the . These forms persisted due to less phonetic alteration in Romance and Arabic-speaking regions. Additional variants include ornamental or translated names like in English-speaking areas, adopted as direct equivalents to signify clerical heritage. The widespread adoption of fixed surnames among Jews occurred primarily in the late 18th and early 19th centuries, driven by European governmental mandates requiring hereditary family names for taxation, military , and . In the Habsburg Empire, Emperor Joseph II's 1787 edict compelled to select surnames, often from like "kohen" to preserve identity and prestige. Similar laws followed in (1812), the (1804–1845), and other states, leading to the formalization of these priestly indicators. During this period, some non-Kohanim adopted Cohen-derived names for or convenience, such as inheriting a maternal , though this diluted the direct correlation to priestly descent. Demographic estimates indicate that kohanim comprise approximately 4-5% of the global Jewish male population. With a worldwide Jewish population of about 15.7 million as of 2023 (roughly half male), this suggests around 300,000-400,000 kohanim today. However, not all bear Cohen-derived surnames due to historical name changes or adoptions. Globally, the surname Cohen and its variants are borne by approximately 391,000 individuals, with the highest concentrations in Israel (about 160,000) and the United States (145,000), representing a significant portion of the Jewish population. However, not all bearers are Kohanim; conversions to Judaism, name changes, or adoptions for prestige mean that surname alone is an unreliable indicator of lineage, often requiring corroboration through family tradition or Y-chromosomal DNA testing, which shows partial genetic correlations with priestly markers.

Kohanim Beyond Judaism

In Samaritanism and Karaism

In Samaritanism, the kohanim maintain a hereditary priesthood tracing descent from through his son and grandson , with the serving as the community's primary religious authority. The current , , assumed office in 2013 following the death of his predecessor, and he is regarded as the 133rd in the line since according to Samaritan tradition. Without a temple, Samaritan kohanim perform rituals and blessings centered on , which they consider the divinely ordained holy site, including annual sacrifices and other ceremonies that emphasize priestly mediation. Marital restrictions for kohanim parallel biblical prohibitions, such as avoidance of unions with divorcees or converts, reinforced by the community's overall endogamous practices to preserve lineage purity. The Samaritan community, numbering approximately 900 individuals as of 2024, consists of four main family lineages, with the priestly Cohen clan comprising a significant portion whose male members all serve as kohanim. Genetic studies of Y-chromosomal microsatellites reveal close affinity between Samaritan priests and Jewish , including shared signatures of the (CMH), supporting a common ancient Israelite patrilineal origin despite historical isolation. In Karaism, a Jewish sect that emerged in the 8th century CE and rejects rabbinic interpretations in favor of a literal reading of the , kohanim preserve their hereditary priestly status based solely on biblical lineage without reliance on the or . Karaite communities, totaling around 30,000–50,000 globally with the largest concentrations in and smaller remnants in , observe Torah-mandated practices for kohanim such as , the redemption of the firstborn son by payment to a kohen. However, without a temple, they do not perform sacrificial rites, though kohanim may recite the (Birkat Kohanim) in services during festivals and , adapting it to post-Temple contexts. Marital restrictions for Karaite kohanim adhere strictly to Torah prohibitions, emphasizing to maintain purity of descent. Historically, Samaritanism traces its divergence from mainstream to around the 4th century BCE, following the construction of a temple on amid tensions over sacred sites, contrasting with Jewish emphasis on . In contrast, Karaism arose later as a reform movement within , prioritizing scriptural literalism over oral traditions, which distinguishes it from both and Samaritanism's unique cultic focus on Gerizim.

Influences in other faiths

In Christianity, the concept of the kohen as a hereditary priesthood is explicitly contrasted and superseded in the , particularly in the , which portrays as an eternal in the order of rather than the Aaronic line. 7–8 emphasizes that the Aaronic priesthood was imperfect and temporary, serving as a shadow of the superior, non-hereditary priesthood fulfilled by Christ, who offers eternal intercession without the need for Levitical descent or repeated sacrifices. This theological shift underscores a rejection of hereditary priestly roles in favor of a universal priesthood of believers, as articulated in 1 Peter 2:9, where all Christians are described as a "royal priesthood." While mainstream quickly abandoned hereditary priesthoods, some Jewish-Christian groups briefly retained elements of Jewish ceremonial practices during the first two centuries CE, blending them with messianic beliefs before fading amid the broader parting of ways between and . In contrast, the maintains hereditary priestly lineages, with priest-families (often tracing descent through specific clans) serving in key ritual roles, reflecting a unique synthesis of ancient Jewish influences and local traditions that preserved familial transmission of clerical authority. Islam lacks a direct equivalent to the hereditary kohen, as roles like (prayer leader) and (preacher) are generally non-hereditary and based on knowledge, piety, and community election rather than descent. The acknowledges Israelite priests in historical contexts, such as in Surah Al-Ma'idah 5:44, which describes the as containing guidance and light, with prophets and rabbis judging by it for the , thereby recognizing the kohanim's role in pre-Islamic Jewish scripture without adopting a similar structure. Beyond Abrahamic faiths, parallels appear in other traditions with Semitic or diasporic connections. features a hereditary priesthood, where tarmida (junior priests) and ganzibra (senior priests) roles are passed down through family lines, preserving ritual purity and baptismal rites in a manner reminiscent of kohanic transmission, though adapted to Mandaean gnostic theology. Zoroastrianism's mobeds, or priests, traditionally operate within a hereditary framework limited to male descendants of athravan (priestly) families, involving ceremonies that echo the exclusivity of Levitical descent, despite some modern relaxations allowing lay participation as para-mobeds. Historical communities, such as the in , have maintained kohanim lineages claiming descent from ancient Israelite priests, influencing local practices like ritual handwashing and priestly blessings among this group since at least the , when their was formally recognized. Scholars posit that shared concepts of priesthood across these traditions may stem from common Semitic roots in ancient Near Eastern religious structures, where familial or tribal roles for cultic officiants were prevalent, but argue there is no evidence of direct borrowing from Jewish kohanim practices after the destruction of the Second Temple in 70 CE, as itself shifted toward rabbinic authority and adaptations.

References

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