Family/Spouse: Philip de Briouze. Philip and died. [Group Sheet] [Family Chart]
William married Bertha de Pîtres before 1150. Bertha (daughter of Miles of Gloucester de Pîtres, 3rd Earl Hereford-Lord High Constable of England and Sybil de Neufmarche) was born in 1130; and died. [Group Sheet] [Family Chart]
William married Maud (Matilda) de St Valerie about 1166. Maud (daughter of Bernard of Hinton Waldrist in Berkshire (now Oxfordshire) de St Valerie and Matilda) was born about 1155 in France; died in 1210. [Group Sheet] [Family Chart]
Family/Spouse: Gruffydd ap Rhys, Lord of South Wales. Gruffydd (son of Rhys ap Gruffydd, Lord Rhys of South Wales and Gwenlian verch Madog) died in 1202; was buried in Strata Florida. [Group Sheet] [Family Chart]
William married Matilda de Clare in 1206. Matilda (daughter of Richard de Clare, 3rd Earl of Hertford and Amicia of Gloucester, Countess of Gloucester) was born about 1184; died in 1213. [Group Sheet] [Family Chart]
Family/Spouse: Walter de Lacy, Lord of Meath. Walter (son of Hugh de Lacy, Lord of Meath and Rose of Monmouth) died on 24 Feb 1240. [Group Sheet] [Family Chart]
Family/Spouse: Gwenllian (Gwladus) Ddu the Dark (Dark Eyes) Verch Llwewlyn. Gwenllian (daughter of Llywelyn Fawr the Great ap Iowerth, Prince of Wales and Tangwystyl Goch) was born about 1205 in Caernarvonshire, Wales; died in 1251 in Windsor, Berkshire, England. [Group Sheet] [Family Chart]
Family/Spouse: Robert of Leicester de Beaumont, 4th Earl of Leicester. Robert (son of Sir Robert of Leicester de Beaumont, 3rd Earl of Leicester and Pernell (Petronilla) de Grandmesnil) died about 21 Oct 1204. [Group Sheet] [Family Chart]