Nielsen Hayden genealogy
Family: Robert de Willoughby / Margaret Deincourt (F8567)
m. Bef 1304
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William de Willoughby ( -1290)
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Alice Beke ( -1311)
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| Edmund Deincourt ( -1327)
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John Deincourt ( -1326)  |
| Isabel Deincourt ( -1348) |
| Margaret Deincourt ( -1333)
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| Robert de Willoughby (1250-1317)
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| John de Willoughby (1304-1349) |