Prince of Glamorgan Iestyn ap Gwrgan
Iestyn was born in 1044 in Morgannwg, Cymru.¹   He died at the age of 49 in 1093 in Llangenyw, Dynbich, Cymru, Wales.² 

 Constance Wen ferch Cadwgon
Constance was born in 1045 in Melinydd, Maesyfed, Cymru.³ 

 Catrin ferch Iestyn
Catrin was born in 1065 in Morgannwg, Cymru.⁴ 

 Nest verch Iestyn
Nest was born in 1067 in Coity, Morgannwg, Glamorganshire, Wales.⁵ 

 Gwenllian verch Iestyn
Gwenllian was born in 1069 in Coity, Morgannwg, Glamorganshire, Wales.⁵ 

 Madog ap Iestyn
Madog was born in 1073 in Coity, Morgannwg, Glamorganshire, Wales.⁵ 

 Caradog ap Iestyn
Caradog was born in 1076 in Coity, Morgannwg, Glamorganshire, Wales.⁶