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

William was born in Helmsley, Holderness, Yorkshire, England.  William's father was Robert De Ross and his mother is Isabel Princess of Scotland.  His paternal grandparents are Everard de Ros and Roysia Trusbut; his maternal grandfather was William I "the Lion" King of Scotland and his maternal grandmother is Isabel De Avenal.  He was an only child.  He died in 1226 in England?.


William's family with Lucia Fitzpiers

‌William and Lucia were married in a religious ceremony about 1220.  They had two sons named Alexander and William.

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