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Male John de Mortimer , of Grendon Click to view John de Mortimer , of Grendon in the family tree

John de was born about 1300 in Wigmore, Herefordshire, England.  John de's father was Edmund 1st Baron de Mortimer , 7th Lord Wigmore and his mother was Margaret de Fiennes.  His paternal grandparents were Roger de Mortimer , 6th Lord of Wigmore and Maud de Braose. He had a brother and two sisters, named Roger de, Maud de and Joan de.  He was the youngest of the four children. He had a half-sister named Isolde (Iseude) de.  He died in Grendon, Wellingborough, Northamptonshire, England.

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