Nielsen Hayden genealogy
Family: John Clifford / Elizabeth Percy (F15964)
m. Between Aug 1403 and 5 Nov 1412Thomas de Clifford (1363-1391) 
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Elizabeth de Ros ( -1424)
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| Henry "Hotspur" Percy (1364-1403)
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| Elizabeth Mortimer (1371-1417)
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Henry Percy (1393-1455)  |
| John Clifford (1389-1422)
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| Elizabeth Percy ( -1436)
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