Nielsen Hayden genealogy
Family: Geoffrey de Gresley / Margaret Gernon (F937)
m. Abt 1318
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Peter de Gresley ( -1310)
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Joan de Stafford ( -1342)
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| Alice de Plessis ( -1302)
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John Gernon ( -1339)  |
| Geoffrey de Gresley ( -1332)
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| Margaret Gernon ( -1353)
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| John Gresley (1328-1396) |