- David E. Thornton
Rhydderch Hen (fl.c. 573–c. 612), king of Strathclyde, was son of Tudwal Tudclyd ap Clynog. He ruled the north British kingdom of Strathclyde, based at Dumbarton, in the second half of the sixth century. When or whom he succeeded to the kingship is not known; most of the available information about his life and rule is derived from incidental notices in saints' lives. In these texts his pious character is stressed: he was allegedly baptized in ...