Robert de GRENTEMESNIL 
Robert de was born about 0990 in Grentemesnil, France. Robert de's father was Gervase le BRETON. He was an only child. He died on June 17th, 1039 in France.
They had a son named Hugh de.
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Children
Hugh de GRENTEMESNIL
Hugh de was born about 1030 in Grentemesnil, France. He died on February 22nd, 1094 in Leicestershire, England.