Rhiwallon ap , Prince of Powys Cynfyn

Rhiwallon ap , Prince of Powys was born in 1026 in Powys, Wales.  Rhiwallon ap , Prince of Powys' father was Cynfyn ap Gwerystan and his mother was Angharad verch Maredudd.  His maternal grandparents were Maredudd ap Owain and Miss verch Llandilo. He had a brother and two sisters, named Bleddyn ap, Miss verch and Iwerydd verch.  He was the youngest of the four children. He had a half-brother named Gruffudd ap , Prince of Wales.  He died at the age of 43 in 1069.

He had a biological daughter named Gwladus verch.