Mabel FitzWilliam of Gloucester, Countess of Gloucester, was born circa 1155 to William Fitz Robert, 2nd Earl of Gloucester (-1183) and Hawise de Beaumont (c1125-c1172) and died 1198 of unspecified causes. She married Gruffudd ap Ifor Bach (c1158-1211) . She married Amaury V de Montfort-Évreux (-c1182) 1170 JL . William I of England (1027-1087), Charlemagne (747-814), Hugh Capet (c940-996), Rollo of Normandy (860-932), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Rollo of Normandy (860-932)/s.
|Nest ferch Gruffudd (c1174-)|
|Rhys ap Gruffudd (c1175-)|
|Hywel Felyn ap Gruffudd (c1179-).|
|Mawd ferch Gruffudd (c1181-)||1181 United Kingdom||Hywel ap Madog (c1180-)|
|Amaury VI de Montfort-Évreux (c1172-1213)|