The Anglo-Saxon Chronicle has this to say:
560 In this year Ceawlin succeeded to the kingdom of Wessex, and Ælla succeeded to the kingdom of the Northumbrians [footnote: Deira]. Ida having died, and each of them reigned thirty years.
[The following is supplied from another source:] Ælla was the son of Yffe, the son of Uxfrea, the son of Wilgisl, the son of Westerfalca, the son of Sæfugl, the son of Sæbald, the son of Segegeat, the son of Swebdæg, the son of Sigegar, the son of Wædæg, the son of Woden.
588 In this year King Ælla passed away and Æthelric reigned five years after him.
617 In this year Æthelfrith, King of Northumbria, was slain by Ræwald, King of East Anglia, and Edwin, son of Ælle, succeeded to the kingdom, and conquered all Britain except Kent alone, and drove out the princes, the sons of Æthelfrith: the eldest was Eanfrith, Oswald, Oswy, Oslac, Oswudu, Oslaf, and Offa.