Rhiwallon ap Cynfyn
Rhiwallon ap was born about 1023 in Powys, Wales.  He died in 1070 in Mechain, Montgomeryshire, Wales.

 Beatrice Gladys verch Rhiwallon
Beatrice Gladys verch was born about 1040 in Powys, Wales.

 Gwladys verch Rhiwallon
Gwladys verch was born in 1041 in Powys, Wales.

 Sionet verch Rhiwallon
Sionet verch was born about 1048 in Powys, Montgomeryshire, Wales.