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Male Guillaume d'Avesnes Click to view Guillaume d'Avesnes in the family tree

Guillaume was born in 1254 in <, Valenciennes, Nord, France>.1   Guillaume's father was Jean I d'Avesnes and his mother was Amice Burgundy.  His paternal grandparents were Bouchard De Avesnes and Marguerite De Flandres; his maternal grandparents were Floris IV Burgundy and Mathilde de Brabant. He had five brothers and three sisters, named Jean II, Baudouin, Bouchard, Guy, Floris, Elizabeth de, Jeanne and Marguerite.  He was the fifth oldest of the nine children.  He died at the age of 42 in 1296.1 

1 Isabella D'AVESNES.FTW
Further source/citation:
"Genealogical Research of Kirk Larson"

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