A younger son of St. Constantine, he succeeded his brother, Gerren, as King. Like his predecessor, he was killed fighting the armies of Bernicia. In 613, King Æthelfrith had invaded Gwynedd in order to stop King Iago restoring his old enemy, Edwin, to the Deiran (East Yorks) throne. The armies of Gwynedd, Powys, Pengwern & Dumnonia rose to repel him, but were bitterly defeated at the Battle of Caer-Legion (Chester, Ches). Kings Iago of Gwynedd & Selyf Sarffgadau (Battle-Snake) of Powys were killed, and it was probably left to Bledric to command the British forces at the Battle of Bangor-is-Coed (Bangor-on-Dee, Powys Fadog) that followed shortly afterwards. It was here that the Dumnonian King met his maker.