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.
Coñécese ben pouco do seu reinado, pero rematou cando, como o describen os Annales Cambriae, os fillos de Eliffer, Peredur e Gwrgi, os dous reis de Efrog, o mataron na Batalla de Arfderydd en 573.