Nielsen Hayden genealogy
Family: Hugh de Giffard / Sibyl de Cormeilles (F3968)
Walter Giffard ( -1193) 
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| Walter de Cormeilles ( -1203) |
| Hugh de Giffard ( -1246)
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Sibyl de Cormeilles (1200-1278)
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Maud Giffard ( -1297)  |
| Walter Giffard, Archbishop of York (1225-1279) |
| Godfrey de Giffard, Bishop of Worcester (1235-1302) |