sentences:  After Gwgon's death, Rhodri, husband to the dead king's sister Angharad, became steward of his kingdom.This gave Rhodri no standing to claim the kingship of Seisyllwg himself, but he was able to install his son Cadell as a subject king.Cadell died around 911, and his lands in Seisyllwg appear to have been divided between his two sons Hywel and Clydog.