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Petronille de Grandmesnil was born circa 1134 in Leicestershire, England to Guillaume de Grandmesnil (c1100-c1147) and Beatrix de Rye . She married Robert de Beaumont, 3rd Earl of Leicester (1130-1190) . Notable ancestors include Charlemagne (747-814). Ancestors are from France, Germany, Belgium.
|Offspring of Petronille de Grandmesnil and Robert de Beaumont, 3rd Earl of Leicester (1130-1190)|
|Robert Beaumont|| |
|Roger Beaumont|| |
|William Beaumont|| |
|Amicia Beaumont (c1155-1215)||<year not a number>||<year not a number>|| Simon IV de Montfort (c1156-1187)|
Guillaume II des Barres
|Margaret Beaumont (1180-1236)||<year not a number> Hampshire, England||<year not a number> Northamptonshire, England|| Saer de Quincy, 1st Earl of Winchester (c1170-1219)|
|Havise Beaumont|| |