- T. F. Tout
- , revised by A. D. Carr
Gwenwynwyn (d. 1216?), ruler in Wales, was the eldest son of Owain Cyfeiliog, prince of southern Powys. In 1187 he is first mentioned as joining with his brother Cadwallon in slaying Owain, son of Madog ap Maredudd, by treachery. In 1196 he was engaged in war with ...