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Male William de Mortaigne Earl of Cornwall Click to view William de Mortaigne Earl of Cornwall in the family tree

William de Mortaigne Earl of was born in 1058 in Cornwall, England.  William de Mortaigne Earl of's father was Robert de Mortaigne Earl of Cornwall and his mother was Matilda De Montgomery.  His paternal grandparents were Herluin de Conteville Viscount Conteville and Herleva De Falaise; his maternal grandparents were Roger de Montgomery II Earl of Shrewsbury and Mabel Talvas. He had a brother and a sister, named Richard and Agnes.  He was the second oldest of the three children.  He died at the age of 82 in 1140.

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