Bede gives the line of descent as follows: "Ethelbert was son of Irminric, son of Octa, and after his grandfather Oeric, surnamed Oisc, the kings of the Kentish folk are commonly known as Oiscings.
Beda da a seguinte liñaxe: "Aethelberht era fillo de Irminric, fillo de Octa, e despois do seu avó Oeric, cuxo alcume era Oisc, os reis do pobo de Kent xeralmente coñecéronse como Oiscing.