Question: Alhfrith was King of Deira under his father, who was King of Bernicia following the death of which brother in 642?
Sentence (from "Edwin of Northumbria"): Edwin (Old English: "Ēadwine" ; c. 586 – 12 October 632/633), also known as Eadwine or Æduinus, was the King of Deira and Bernicia – which later became known as Northumbria – from about 616 until his death.
Relevant evidence: No