Nielsen Hayden genealogy
Family: Peter fitz Herbert / Alice fitz Robert (F4826)
m. Aft 28 Nov 1203Herbert fitz Herbert (1140-1204) 
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Lucy of Hereford ( -1220)
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| Robert fitz Roger ( -1212)
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| Margaret de Chesney ( -1230)
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John fitz Robert ( -1240)  |
| Peter fitz Herbert (1182-1235)
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| Alice fitz Robert ( -1225)
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| Lucy fitz Peter ( -1266) |
| Reynold fitz Peter ( -1286) |