 Little is known of his reign, but it ended when, as described in the "Annales Cambriae", the sons of Eliffer, Peredur and Gwrgi, the joint kings of Efrog, killed him at the Battle of Arfderydd in 573.It is possible he was succeeded by one of his brothers.This was one of many battles fought between Brythonic kings who led the various fractured successor states that took over the Roman province of Brittania following the Roman withdrawal.