| Eltern | Geschwister | Kinder |
| Edmund Mortimer | ||
| Maud Mortimer | ||
| Margaret Mortimer | ||
| Roger Mortimer | ||
| Catherine Mortimer | ||
| Geoffrey Mortimer | ||
| Agnes Mortimer | ||
| Roger Mortimer | Joane Mortimer | |
| Blanche Mortimer | Isabel Grandison | |
| Joan Geneville | Beatrice Mortimer | |
| John Mortimer | ||
| Partner | ||
| Piers Grandison |