Blanche de Guisy
- Born: 945, Guisy, Pas-de-Calais, France
- Marriage (1): Helfred de Hesdin in 961 in Guisy, Pas-de-Calais, Hauts-de-France, France
- Died: After 964, Hesdin, Pas-de-Calais, France
FamilySearch ID: GY9N-TST.
Blanche married Helfred de Hesdin, son of Haymon de Hesdin and Geboren, in 961 in Guisy, Pas-de-Calais, Hauts-de-France, France. (Helfred de Hesdin was born in 940 in Hesdin-l'Abbé, Pas-de-Calais, France, died in 974 in Hesdin, Duchy of Lorraine, France and was buried in 974 in Hesdin, Duchy of Lorraine, France.)
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