Euphémie was the daughter of Guillaume II and Mélissende de Picquigny. The date and place of her birth have not been found.
Her husband was Baudouin II de Bailleul, who she married in 1139. The place has not been found. Their six known children were Gérard (<1179-?), Marguerite (<1193-1254), Hoston (?-?), Adelis (?-?), Mahaut (?-?) and Melissende (?-?).
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Guillaume II |
Guillaume I |
Baudouin I de Saint-Omer |
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Mélissende de Picquigny |
Eustache de Picquigny |
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