Nielsen Hayden genealogy
Family: Henry IV, King of England / Mary de Bohun, Queen Consort of England (F9685)
John of Gaunt (1340-1399) 
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Blanche of Lancaster (1345-1368)
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| Humphrey de Bohun (1342-1372)
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| Joan Fitz Alan ( -1419)
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Eleanor de Bohun (1366-1399)  |
| Henry IV, King of England (1367-1413)
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| Henry V, King of England (1386-1422) |
| Thomas of Lancaster (1387-1421) |