Robert de Mortimer 
He had a biological son named William.
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Personal Details
Robert de Mortimer
Robert was born in 1210 in Attleborough, Wayland, Norfolk, England. He died at the age of 55 in 1265.
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Children
William de Mortimer
William was born in 1240 in Attleborough, Wayland, Norfolk, England. He died at the age of 57 on December 11th, 1297.