Rhydderch ap Tewdwr

Rhydderch ap was born in 1055 in Derllys, Gwarthaf, Carmarthenshire, Wales.  Rhydderch ap's father was Tewdwr "Mawr-The Great" ap Cadell , King S. Wales and his mother was Gwenllian verch Gwyn.  His paternal grandparents were Cadell ap Einion and Elinor verch Gwerystan. He had a sister named Elen verch.  He was the younger of the two children. He had a half-brother named Rhys ap.