RHIWALLON ap CYNFYN (d. 1070), king of Powys;
second son of Cynfyn ap Gwerstan (q.v.) [Ni chafwyd erthygl] by Angharad, daughter of Maredudd ap Owen (q.v.), and brother of Bleddyn (q.v.). Co-ruler of Powys from 1063, he was killed at the battle of Mechain. His son Meilyr d. in 1081, and his daughter, Gwladus, m. Rhys ap Tewdwr (q.v.).
Author:
Professor Thomas Jones Pierce, M.A., F.S.A., (1905-1964), Aberystwyth
