Eadberht became ruler of Northumbria following the second abdication of his cousin Ceolwulf, who entered the monastery at Lindisfarne.
Unlike Ceolwulf's first abdication, which clearly involved force, his second, in favour of Eadberht, may have been voluntary.

Eadberht son of Eata was a descendant of Ida of Bernicia through either his son Ocga (Anglo-Saxon Chronicle and Anglian collection) or Eadric (Historia Brittonum).
 The genealogy gives Eadberht's father Eata the cognomen Glin Mawr.
Eadberht became ruler of Northumbria following the second abdication of his cousin Ceolwulf, who entered the monastery at Lindisfarne. Unlike Ceolwulf's first abdication, which clearly involved force, his second, in favour of Eadberht, may have been voluntary.
Eadberht son of Eata was a descendant of Ida of Bernicia through either his son Ocga (Anglo-Saxon Chronicle and Anglian collection) or Eadric (Historia Brittonum).  The genealogy gives Eadberht's father Eata the cognomen Glin Mawr.
Eadberht of Northumbria