| Eltern | Geschwister | Kinder |
| Henry Percy | Margaret Percy | Henry Percy |
| Henry Percy | Thomas Percy | |
| Idonea Clifford | Richard Percy | Mary Percy |
| Roger Percy | ||
| Isabel Percy | ||
| Robert Percy | ||
| Thomas Percy | ||
| William Percy | ||
| Maud Percy | ||
| Eleanor Percy | ||
| Partner | ||
| Mary Plantagenet | ||
| Joan Orreby |