Nielsen Hayden genealogy
Family: Robert Howard / Margaret Mowbray (F8970)
m. Aft 21 Feb 1421John Howard (1365-1436) 
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Alice Tendring ( -1426)
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| Thomas Mowbray (1367-1399)
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| Elizabeth Fitz Alan (1371- )
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Isabel Mowbray ( -1452)  |
| Robert Howard ( -1436)
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| Margaret Mowbray ( -1459)
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| John Howard ( -1485) |