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

William was born about 1244 in Ingmanthorpe, Yorkshire, England.  William's father was William de Roos and his mother was Lucia FitzPiers.  His paternal grandparents were Robert "Furfan" de Roos and Isabella Avenal; his maternal grandparents were Piers FitzHerbert and Alice FitzRobert. He had a brother named Robert de Roos IV.  He was the younger of the two children.  He died before May 28th, 1310.

Family Details of William's family with Eustace FitzHugh

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