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Male Sir William De Ros II Click to view Sir William De Ros II in the family tree

William was born in 1240 in Ingmanthorpe, Kirk Deighton, Yorkshire, England.1   William's father was Sir William De Ros and his mother was Lucy Brecknock FitzPiers.  His paternal grandparents were Sir Robert (Furfan, Fursan) De Ros 4th Lord of Hamlake and Princess Isabel of Scotland; his maternal grandparents were Peter Fitzherbert and Alice de Warkworth FitzRoger. He had a brother and a sister, named Robert and Alice.  He was the second oldest of the three children.  He died at the age of 70 on May 28th, 1310 in Grey Friars, York, Yorkshire, England.1 

Family Details of William's family with Eustace FitzHugh

1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=stolp&id=I9363&style=TABLE
Further sources/citations:
http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jdp-fam&id=I7458, http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=stolp&id=I4590

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