 After the assassination of the northern Britons' overlord, Urien Rheged, Dynod is said to have invaded Urien's kingdom of Rheged, doing battle against Urien's sons Owain and Pascent.He was reputed to have been the father of Saint Deiniol, founder of Bangor.He is said to have died at the hands of the Bernician Angles around AD 595, although Welsh tradition identified him with the abbot Dynod at Bangor-on-Dee who was mentioned in Bede's treatment of the early 7th century Synod of Chester.