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

William was born in Cornwall, England.  William's father was Earl Robert de Mortaigne of Cornwall and his mother was Maud de Montgomery.  His paternal grandparents were Count Herlouin de Conteville of Mortaigne and Herleva de Falaise; his maternal grandparents were Earl Roger de Montgomery of Shrewsbury and Mabel de Talvas de Belleme. He had four sisters named Matilda, Agnes, Denise and de Mortaigne.  He died after 1140.


William's first family with Isabel FitzRichard de Clare

They had a daughter named Beatrice.


William's second family

He had a biological son named Aldhelm.

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