Nielsen Hayden genealogy
Family: (Unknown) de Mandeville / Alice Giffard (F771)
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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) |
| Sybil de Mandeville (1264-1308) |