Succeeded his brother in 1072 and carried on the struggle against Caradoc. In 1075 he brought about the death of Bleddyn ap Cynfyn, ruler of Powys and Gwynedd, but three years later was himself defeated by Bleddyn's successor in Gwynedd and cousin, Trahearn ap Caradoc. Brut recorded that he became like a timid stag, hunted through thickets and rocks. Shortly after, Rhys and his brother Hywel were killed by Caradoc ap Gruffydd, who had killed their predecessor, Maredudd.
From The Kings and Queens of Britain in Oxford Reference.
Subjects: British History.