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Male William III De Bethune Seigneur De Molembecq Click to view William III De Bethune Seigneur De Molembecq in the family tree

William III De was born about 1190 in Bethune,Pas-DE-Calais,Normandy,France.  William III De's father was Guillaume II de Béthune and his mother was Mahaut Countess De Tenremond.  His paternal grandparents were Robert V de Béthune and Adélaïde de Saint-Pol; his maternal grandparents were Gauthier III Comte De Tenremond and Alix De Molembeque-Rosoy. He had a brother and a sister, named Robert VII Comte De and Helvide De.  He was the second oldest of the three children.  He died in 1278.


William III De's family


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