[1] Originally a North British chieftain, he was driven by reverses of fortune into Wales, where under the patronage of Cyngen Glodrydd, Prince of Powys, he founded the monastery of Bangor on the Dee.
[2] The monastery was destroyed in about 613 by the Anglo-Saxon king Æthelfrith of Northumbria after he defeated the Welsh at the Battle of Chester; a number of the monks then transferred to Bardsey Island.
Bede states that Dunod (Dunawd) was still abbot of Bangor Iscoed at the time of the second meeting of Augustine of Canterbury with the seven Welsh bishops at 'Augustine's Oak' (possibly Aust in Gloucestershire or Cressage in Shropshire) in 602 or 603.
While it is true that delegates from Bangor attended the conference, Dunod would have been far advanced in years, and the journey from North Wales to the Lower Severn would have been a difficult one for an aged man.
[1] He is often identified with Dunod Fawr ap Pabo Post Prydain, a Brythonic King ruling somewhere in the North of Britain and father of Saint Deiniol, the first Bishop of Bangor in Gwynedd.