Oisc (also Æsc or Esc, pronounced “oish” or “ash”) was an early king of Kent. He seems to be the same person as Ansehis (or Anschis) who is described as a leader of the Saxon invaders of Britain in the Ravenna Cosmography.
Little is known about him, and the information that does survive regarding his life is often vague and suspect. He seems to have been the son or the grandson of Hengest, who led the initial Anglo-Saxon conquest and settlement of Kent. According to Bede's Ecclesiastical History of the English People, Oisc's given name was Oeric. Bede indicates that he was the son of Hengest and travelled to Britain with him, with the permission of the British king Vortigern. He was the father of Octa, who succeeded him. His descendants called themselves "Oiscingas" after him.
- H.M. Chadwick, The Origin of the English Nation, Cambridge 1907, pp. 44-47.
- Ecclesiastical History of the English People, Book 2, chapter 5.