king of Gwynedd (1132–70). Noted by contemporaries for his wisdom, prowess, and prudence, his creation of a large feudal principality in Gwynedd was an inspiration to his successors. The second son of Gruffydd ap Cynan (d. 1137), king of Gwynedd, he and his brother Cadwallon helped their father to expand Gwynedd's power (1120s). As king (Cadwallon died in 1132), he strengthened his hold on church and state in Gwynedd, exploited the anarchy in England to advance south, and took his authority eastwards to the Dee. By his death (28 November 1170) he was the pre‐eminent ruler in Wales.
Subjects: British History.