Margaret de Fiennes 
Margaret was born in 1262. Margaret's father was William de Fiennes and her mother was Blanche de Brienne. She was an only child. She died at the age of 71 on February 7th, 1333.
They had a son named Roger.
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Children
Roger de Mortimer
Roger was born on April 25th, 1287. He died at the age of 43 on November 29th, 1330.
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