| Male Henry de Percy |
| Birth | 1320 | |
| Death | 18 May 1368 | |
| Burial | ||
| Marriage | Sep 1334 [1] | |
| Father | Henry de Percy | F4062 Group Sheet | |
| Mother | Idoine de Clifford | F4062 Group Sheet | |
| Female Mary Plantagenet |
| Birth | 1320 | |
| Death | 1 Sep 1362 | |
| Burial | ||
| Father | Earl Of Lancaster Henry Plantagenet | F3242 Group Sheet | |
| Mother | Maud de Chaworth | F3242 Group Sheet | |
| Male Henry de Percy, Earl of Northumberland |
| Birth | 10 Nov 1341 | |
| Death | 19 Feb 1408 | Bramham Moor, West Yorkshire, England |
| Burial | ||
| Spouse | Margaret de Neville | F3222 | |
| Marriage | 12 Jul 1358 | |
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