Gwenllian verch Iestyn
Gwenllian verch Iestyn was born about 1081. Gwenllian verch Iestyn's father was
last Prince of Glamorgan, King of Morgannwg Iestyn ap Gwrgant and her mother is
Gwenwyn verch Cyfan. Her paternal grandparents are
Prince of Powys Gwrgant ap Ithel and
Gwladus verch Ednowen Bendew *. She has four brothers and a sister, named
Rhodri ap Iestyn,
Gruffydd ap Iestyn,
Morgan Hir ap Iestyn,
Hywel ap Iestyn and
Sybil verch Iestyn. She is the youngest of the six children. She has eleven half-brothers and two half-sisters, named
Mareddud ap Iestyn,
Cynfrig ap Iestyn,
Cadogan ap Iestyn,
Rhywallon ap Iestyn,
Rhudlan ap Iestyn,
Yoreth ap Iestyn,
Meurig ap Iestyn,
Caradog ap Iestyn,
Rhys ap Iestyn,
Morgan ap Iestyn,
Madog ap Iestyn,
Ellen verch Iestyn and
Nesta verch Iestyn.