Hughes of Gwerclas were a native Welsh royal family descended from prince Owain Brogyntyn the illegitimate but acknowledged son of prince Madog ap Maredudd by a daughter of the "Maer du" or "black mayor" of Rûg in Edernion. His father granted to him and his successors the Cantref of Edeyrnion and the Lordship of Dinmael. These areas were both remote frontier lands situated between Powys and the neighbouring ascendant Kingdom of Gwynedd. From the earlier part of the 12th Century both lordships usually paid homage to Gwynedd.