covering an area roughly corresponding to the kingdoms of Dyfed and Seisyllwg of which Hywel was King, also bears his name.

Early life

Hywel was the son of King Cadell ap Rhodri of Seisyllwg. He had a brother, Clydog ap Cadell, who was probably the younger of the two. Hywel was later reputed to have married Elen ferch Llywarch (893-943), the supposed heiress of King