The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
 MaleWilliam d'Aubigny, Magna Carta surety baron, Lord of Belvoir m Margaret Umfreville |
| Birth | 1146 | Leicestershire, England, UK  |
| Death | May 1236 | Uffington, Lincolnshire, England, UK |
| Burial | ||
| Marriage | ||
| Father | ||
| Mother | ||
 FemaleMargaret de Umfreville, m. Sir William d'Aubigny, Knight |
| Birth | abt. 1146 | Prudhoe Castle, Northumberland, England, UK |
| Death | ||
| Burial | ||
| Father | Odinel II de Umfreville, of Castles of Otterburn and Harbottle; Lordship of Penmark | F885 Group Sheet | |
| Mother | Alice de Lucy, de Umfraville | F885 Group Sheet | |
| Male + William II d'Aubigny, Lord of Belvoir m Isabel |
| Birth | abt. 1188 | England, UK |
| Death | abt. 4 Sep 1242 | England, UK |
| Burial |
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