Guillaume was the son of Henri I de Normandie but his mother is unknown. The date and place of his birth have not been found.
Henri I de Normandie |
Guillaume de Normandie |
Robert I de Normandie |
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Arlette de Falaise |
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Mathilde de Flandre |
Baudouin V de Lille |
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Adèle de France |
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Note 1
mort peu de temps après son père