The Cambridge University Heraldic & Genealogical Society
 Father | MaleSir Henry Percy, styled Lord Percy |
| Born | 20 May 1364 | |
| Died | ||
| Buried | ||
| Married | ||
| Father | Henry (Percy), 1st Earl of Northumberland | F1045 Group Sheet | |
| Mother | Hon. Margaret de Neville | F1045 Group Sheet | |
| Mother | Female Lady Elizabeth Mortimer |
| Born | 12 Feb. 1370/71 | Usk, Monmouthshire, Wales  |
| Died | ||
| Buried | ||
| Father | Edmund (Mortimer), 3rd Earl of March | F233 Group Sheet | |
| Mother | Philippa (Plantagenet), suo jure Countess of Ulster | F233 Group Sheet | |
 Child 1 | Male+ Henry (Percy), 2nd Earl of Northumberland |
| Born | 3 Feb. 1392/93 | |
| Died | 22 May 1455 | St. Albans, Hertfordshire, England |
| Buried | ||
| Spouse | Lady Eleanor Neville | F492 | |
| Married | After Oct. 1414 | Berwick, Northumberland, England |
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