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Male Sir William De II St. Maur Click to view Sir William De II St. Maur in the family tree

William De II was born in Undy & Penhow, Monmouthshire, England.  William De II's father was Sir William De St. Maur and his mother was Eve Marshall.  His maternal grandparents were 1st Earl of Pembroke William Marshall 1st Earl of Pembroke and Isabel Fitzgilbert De Clare. He had four half-sisters named Eva, Maud, Eleanor and Isabella.  He died in 1271.

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