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Male Guillaume Ier D'eu Click to view Guillaume Ier D'eu in the family tree

Guillaume Ier was born about 0980.  Guillaume Ier's father was Richard Ier Sans Peur De Normandie and his mother was Gunnor De Crépon.  His paternal grandparents were Guillaume Ier Longue Epée De Normandie and Sprotta De Senlis; his maternal grandfather was Herbastus De Crépon. He had two brothers and three sisters, named Robert, Richard II Le Bon, Béatrix, Havoise and Emma.  He was the second youngest of the six children. He had a half-brother named Geoffroi.  He died in June 1025.


Guillaume Ier's family with Lézeline De Tourville

They had two sons named Robert and Guillaume Busac.

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