Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Saint Edwin (Old English: Ēadwine; c. 586 – 12 October 632/633), also known as Eadwine or Aduini, was the King of Deira and Bernicia – which would later become known as Northumbria – from about 616 until his death. He converted to Christianity and was baptised in 627; after he fell at the Battle of Hatfield Chase, he was venerated as a saint. Edwin was the son of Ælle king of Deira and seems to have had (at least) two siblings. His sister Acha was married to Æthelfrith, king of neighbouring Bernicia. An otherwise unknown sibling fathered Hereric, who in turn fathered Abbess Hilda of Whitby and Hereswith, wife to king Anna of East Anglia's brother Æthelric.