Osiris is a fictional character in American comic books published by DC Comics. First appearing in 52 #23, the character was created by Geoff Johns, Greg Rucka, and Grant Morrison. Throughout the publication of the character's history, he often serves as both an analogue to Captain Marvel Jr./Shazam Jr. in Black Adam's supporting cast while being depicted as a superhero, antihero, and villain.

The character's alter-ego is Amon Tomaz, a Cairo-born Egyptian teenager and younger brother of Adrianna Tomaz who is captured and sold into slavery by Intergang, an organized crime syndicate and enemies of Superman whose advanced technology is supplied secretly by Apokoliptian New Gods. Although brutalized, Black Adam heals him by granting him a portion of his power, transforming him into the demigod-esque being and christened as "Osiris", named after the aforementioned deity by the Egyptian deities, and becomes Black Adam's first protege, a royal prince of Kahndaq, and a member of his Black Marvel Family. As Osiris, the character was a brief member of the Teen Titans before he is discredited by Amanda Waller and undergoes a comic book death when he is first killed by Sobek, revealed to be a Apokoliptian Four Horsemen. A older Amon is resurrected during Brightest Day but is corrupted due to outside influences, joining up with Deathstroke's Titans in hopes of resurrecting both his brother-in-law and older sister. Following the New 52 reboot, he is first cast as a Kahndaqi-native teenager and freedom fighter acting as an occult specialist in the Sons of Adam, a group of revolutionaries dedicated to resurrecting Black Adam. Although he was killed by one of the Four Horsemen, aspects of his history are restored.

In the Arrowverse television series Legends of Tomorrow, a different iteration of the character named Behrad Tarazi was introduced and played by Shayan Sobhian. Additionally, Amon Tomaz made his live-action debut in the DC Extended Universe film Black Adam (2022), portrayed by Bodhi Sabongui. In Black Adam, the character is expressed as Adrianna's son rather than younger brother. Her brother was named Karim and was portrayed by Mohammed Amer.

During the development of the 52 series, Osiris' character came into fruition later in the development process as the team behind the book sought to create a love interest for Black Adam (initially considering Power Girl and Hippolyta before settling on creating a new version of Isis) and later, a supporting cast for the character with Amon introduced as a brother-in-law. As Osiris's character came into focus during the series, Geoff Johns created Sobek to act as a unique companion to the character, opting to dis-include another Marvel Family parallel character or another young superhero character.

Osiris was first depicted in Teen Titans #38 (September 2006), making his full appearance in 52 #23 (December 2006), created by Geoff Johns, Grant Morrison, Greg Rucka, Mark Waid, Keith Giffen, and Drew Johnson. He appeared extensively in the 2006-2007 weekly series 52 as a supporting character within Black Adam's portion of the story. The character is eventually killed off in the forty-third issue of the series, with his sequences involving his death drawn by Giffen. Giffen was noted to dislike Osiris and originally drew a short joke comic with Sobek humorously contemplating eating him, unaware of the character's death scene.

In March 2010, Osiris would first briefly return briefly in the Blackest Night crossover event. As part of DC's January campaign of bringing back 'dead comic runs', the Black Lantern Osiris featured in the one-shot The Power of Shazam! revival. Two months later, the character would make a full revival within the eighth issue of the Blackest Night main series.

Born in Cairo, Amon was the younger brother of Adrianna and a teenager with dreams of becoming a musician until his parents are killed by Intergang. The pair are captured and separated as they're sold into slavery but Intergang later intended to brainwash the young man and when he showcased the strength of will to resist their coercion from mind control and torture, he is brutalized into a paraplegic as punishment. He is found by the Question and Renee Montoya, friends of Adrianna (now Isis) and Black Adam and is saved. When his injures proved to great to easily heal, Adam shares his power and makes him to hero and royal prince Osiris, completing his Black Marvel Family.

As Osiris, Amon seeks to use his abilities for good and prove himself heroic despite doubts from the superhero community and world powers due to his affiliation with Black Adam. While Osiris secured membership with the Teen Titans briefly, he is discredited by Amanda Waller and the Suicide Squad when he kills Persuader, whose Atomic Axe and radioactive-based powers proved apt against Isis's power and goes for a killing blow. Now branded a killer, he is ostracized by the hero community and shortly after, is killed by close friend and ally Sobek, revealing himself as Famine. Isis's death follows and in her final words, expresses regret in tempering Adam and pleads to avenge both her and Amon. Their shared deaths proved a catalyst for Adam's rampage during the "World War III" storyline. Despite the Teen Titan's reservations for Osiris, a statue of him was erected in his honor.