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Male Ct. Eustace I of Boulogne Click to view Ct. Eustace I of Boulogne in the family tree

Eustace I of Boulogne was born about 1004 in , Boulogne, Vendee, France.  Eustace I of Boulogne's father was Ct. Ernicule II of Boulogne (Le Petit) and his mother was Aleida of Holland.  His paternal grandfather was Ct. Gui of Boulogne; his maternal grandparents were Graf Arnulf I of W Friesland and Liutgardeof Luxembourg. He had a half-sister named Mahaut or Mathildeof Boulogne.  He died in 1049.


Eustace I of Boulogne's family with Mahaut (Maud) of Louvaine

‌Eustace I of Boulogne and Mahaut (Maud) of Louvaine were married in a religious ceremony in , Brabant, Belgium.  They had three sons named Lambert II of Lens, Lambert II of Lens and Eustace II of Boulogne.

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