William De StMartin 
William was born in 1033 in Varenne, St Aubin Le Cauf, Dieppe, Normandy.1 He died at the age of 20 in 1053.1
They had a son named Geoffrey.
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Children
Geoffrey De Mandeville
Geoffrey was born in 1036 in Rycott, Oxford, England.1 He died at the age of 49 in 1085 in Westminster Abbey, Westminster, Middlesex, England.1
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