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Male William de Mortimer Click to view William de Mortimer in the family tree

William was born in 1248 in Richard's Castle, Herefordshire, England.1   William's father was Earl of Hereford Hugh de Mortimer and his mother was Agatha de Ferrers.  His paternal grandparents were Sir Robert de Mortimer and Margaret de Say; his maternal grandparents were William de Ferrers and Sibyl Marshal. He had three brothers named Robert, Richard and Roger.  He was the second oldest of the four children.

1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=clcaldwell&id=I016658

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