Isle of Thanet

The Isle of Thanet (/ˈθænɪt/) is a peninsula forming the easternmost part of Kent, England. While in the past it was separated from the mainland by the 600-metre-wide (2,000 ft) Wantsum Channel, it is no longer an island.

Archaeological remains testify to its settlement in ancient times. Today, it is a tourist destination, and has an active agricultural base.

The island of Thanet is mentioned as Tonetic (c. AD 150; the TON- of this form was misread as TOΛI-, hence it appears as Toliatis in the surviving manuscripts of Ptolemy); Tanat's, Athanatos and Thanatos (in various copies of 3rd C AD, Solinus); Tanatos (AD 731); Tenid in 679 and Tenet (e.g. charters of AD 679, 689 and thereafter); and the Old Welsh forms Tanet and Danet, found in the Historia Brittonum (c. AD 829/30) and Armes Prydein (c. AD 930).

Standard reference works for English place-names (such as Eilert Ekwall's Concise Oxford Dictionary of English Place-Names) state the name Tanet is known to be Brythonic in origin. Commonly the original meaning of Thanet is thought to be "fire" or "bright island" (tân in Modern Welsh and tan in Breton means fire), and this has led to speculation the island was home to an ancient beacon or lighthouse.

Another theory states that Tanet is a common European toponymic creation of Celtic origin, based on the Celtic word *tanno- meaning "holm oak" (compare Breton tann "sort of oak", Cornish glastannen "holm oak") and the Celtic suffix *-etu, to mean a collection of trees. Thanet would mean "place of the holm oaks", such as the Northern French Thenney (Eure, Thaneth ab. 1050); Tennie (Sarthe, Tanida 9th century) or the Italian Tanedo (Lombardy, Tanetum, Tite-Live). A third theory suggests that the origin of the toponym is the name of the Punic goddess Tanit.

The 7th-century Archbishop Isidore of Seville recorded an apocryphal folk-etymology in which the island's name is fancifully connected with the Greek word for death (Thanatos/Θάνατος), stating that Thanet, "an island of the ocean separated from Britain by a narrow channel ... [was] called Tanatos from the death of serpents; for while it has none of its own, soil taken from it to any place whatsoever kills snakes there."

The Historia Brittonum, written in the 9th century, states that "Tanet" was the name used for the island by the legendary Jutes Hengist and Horsa, while its name in Old Welsh was "Ruoi(c)hin"; this name may be translated as "gift" (rhwych in Modern Welsh).

Other names used by Britons were "Ruim" and "Ruochim Inis".