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

William was born in 1259.  William's father was Roger De Mortimer and his mother was Maud De Braiose.  His paternal grandparents were Ralph De Mortimer and Gwladys "Ddu" ferch Gwladys "Ddu" Verch Llewelyn; his maternal grandparents were William De Braiose and Eve Mareschal. He had four brothers and two sisters, named Ralph, Edmund, Roger, Godfrey, Isabella and Margaret.  He was the youngest of the seven children.

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