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Male William I De Ros Click to view William I De Ros in the family tree

William I was born after 1192 in Helmsley, Yorks., England.1   William I's father was Robert II De Ros and his mother was Isabella von Schottland.  His paternal grandparents were Everard De Ros and Roese De Trussebutt; his maternal grandparents were William I Koenig von Schottland and Isabel Arenel.  He was an only child.  He died in 1264 in Bur Kirkham, Yorks., England.1 

Family Details of William I's family with Lucia\Lucy Fitz Piers

1 World Family Tree Vol. 9, Ed. 1 @ Tree #0120

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