The Cambridge University Heraldic & Genealogical Society
 | Henry (Percy), 1st Earl of Northumberland (1341-1408) 
|
 | Hon. Margaret de Neville ( -1372)
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 | Edmund (Mortimer), 3rd Earl of March ( -1381) |
 | Roger (Mortimer), 4th Earl of March (1373-1398)  |
| Lady Philippe Mortimer (1375-1400) |
| Hon. Edmund Mortimer (1376-1409) |
 | Sir Henry Percy, styled Lord Percy (1364- )
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| Lady Elizabeth Mortimer (1371- )
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| Henry (Percy), 2nd Earl of Northumberland (1393-1455) |
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