William De Greystoke & Hawise D'+ Estouteville 
They had a son named Thomas Fitzwilliam De.
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Personal Details
William De Greystoke
William De was born about 1158 in Grimsthorpe, Lincolnshire, England. He died in 1209.
Hawise D'+ Estouteville
Hawise D'+ was born about 1172 in Knaresborough Castle, West Ride, Yorkshire, England.
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Children
Thomas Fitzwilliam De Greystoke
Thomas Fitzwilliam De was born about 1190 in Greystoke, Cumberland, England. He died in 1247.