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Male John De Mortimer Click to view John De Mortimer in the family tree

John De was born in 1300 in Of, Wigmore, Herefordshire, England.1   John De's father was Edmund De Mortimer Lord of Wigmore and his mother was Margaret de Fiennes.  His paternal grandparents were Roger de Mortimer , Lord of Wigmore and Maud de Braose; his maternal grandparents were William de Fiennes Knight and Blanche de Brienne , Dame de Loupelande. He had four brothers and six sisters, named Roger, Hugh De, Walter De, Edmund II de, Iswolde de, Maude, Matilda, Joan De, Margaret and Elizabeth.  He was the second youngest of the eleven children.  He died at the age of 18 on January 3rd, 1318.1 

1 "Genealogical Research of Kirk Larson"
Further sources/citations:
Ancestral File (TM), Ancestral File (TM)

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