Gervase de GRENTMESNIL 
He had a biological son named Robert de.
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Personal Details
Gervase de GRENTMESNIL
Gervase de was born about 0967 in Bretagne, France. Gervase de is no longer alive.
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Children
Robert de GRENTMESNIL
Robert de was born about 0990 in Grentmesnil, Calvados, France. He died on June 17th, 1038 in France.