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Male William de Fortibus Click to view William de Fortibus in the family tree

William's father was William de Fortibus and his mother was Hawis d'Aumale.  His paternal grandparents were Guillaume d'Aumale and Cicily Fitzwilliam.  He was an only child.  He died on March 29th, 1220.1 

Family Details of William's family with Aveline de Monfichet

1 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I44080&style=TABLE

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