The 9th-century Anglo-Saxon Chronicle, one of the most important sources for this period of history, does not mention Octa. It does, however, mention Hengist and gives Oisc as his son. However, Bede's Ecclesiastical History of the English People, completed around 731, names Octa as the son of "Orric, surnamed Oisc" and the grandson of Hengist.Ecclesiastical History of the English People, Book 2, chapter 5. Conversely, the 9th-century Cotton Vespasian manuscript indicates that Octa was the son of Hengist and the father of Oisc.
