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Male William Guillaume de Briouse Click to view William Guillaume de Briouse in the family tree

William Guillaume was born in 1049 in Brieuze, Normandy, Fra.  William Guillaume's father was Robert de Brusse and his mother was Emma de Bretagne.  His paternal grandparents were Earl Ragnald II Brusesson and Arlogia Vladimirovna; his maternal grandparents were Duke Alan III deBretagne and Bertha deChartres. He had two brothers named Adam (Adelm) and Robert.  He was the oldest of the three children.  He died at the age of 38 in 1087 in Bramber, Sussex, England.1 



William Guillaume's first family with Agnes deSt. Clare

‌William Guillaume and Agnes were married in a religious ceremony before 1073 in Barnstable, Devonshire, England.  They had a son and a daughter, named Philip Lord and Miss.


William Guillaume's second family with Agnes de Clare

They had a son named Philip.


William Guillaume's third family with Eve deBoissay


1 The Plantagenet Ancestry
Further source/citation:
The Plantagenet Ancestry @ 78

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