Gwenwynwyn ab Owain ap Owain Cyfeilioc & Mary (or Margaret) (Margaret) Corbet 
Gwenwynwyn ab Owain and Margaret were married in a religious ceremony in September 1206. They had two sons and a daughter, named Madog ap Gwenwynwyn, Brenin of South Powys and Constance ferch Owain.
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Personal Details
Gwenwynwyn ab Owain ap Owain Cyfeilioc
Gwenwynwyn ab Owain was born about 1165. He died in June 1216.
Mary (or Margaret) (Margaret) Corbet
Mary (or Margaret), known as Margaret, was born in 1170. She died at the age of 48 in 1218.
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Children
Gruffudd (Brenin of South Powys) ap Gwenwynwyn de la Pole
Gruffudd, known as Brenin of South Powys, was born in 1215 and his baptism took place in {Bleddyn Ap Cynfyn}. He died at the age of 72 on February 21st, 1287.
Constance ferch Owain de Powys
Constance ferch Owain was born about 1216 in Powis, Welshpool, Montgomeryshire, Wales. She died in Malpas, Cheshire, England.