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Male Eustace de Guisnes Click to view Eustace de Guisnes in the family tree

Eustace was born about 1039.  Eustace's father was Count de Guisnes Raoul and his mother was Rosetta de St. Pol de Dammartin.  His paternal grandparents were Count de Guisnes Ardolph and Mahaut de Talvas; his maternal grandparents were Roger de St. Pol de Dammartin and Hedwig. He had a brother named Robert "the Admiral".  He was the younger of the two children.

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