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

William de Roos IV was born in 1290 in of Helmsley, Yorkshire.1   William de Roos IV's father was William de Roos III Baron Roos and his mother was Maud de Vaux.  His paternal grandparents were Robert de Roos IV Baron Roos and Isabel de Albini; his maternal grandfather was John de Vaux.  He was an only child.  He died in England.1 

Family Details of William de Roos IV's family with Margery de Badlesmere

1 large-G675.FTW
Further sources/citations:
Garner, Lorraine Ann "Lori", Neville GEDCOM, 11615-2.ftw

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