| Male William Ferrers, 3rd Baron Ferrers of Groby |
| Birth | 1333 | |
| Death | 1371 | |
| Burial | ||
| Marriage | ||
| Other Spouse | Margaret Uford | F864 | |
| Marriage | ||
| Father | Henry Ferrers, 2nd Baron Ferrers of Groby | F4962 Group Sheet | |
| Mother | Isabel de Verdun | F4962 Group Sheet | |
| Female Margaret Percy |
| Birth | ||
| Death | 1375 | Gyng, Essex, England |
| Burial | ||
| Other Spouse | Robert de Umfraville, Sir, KG, Lord of Redesdale | F104 | |
| Marriage | ||
| Father | Henry Percy, 9th Baron Percy of Topcliffe, 2nd Baron Percy of Alnwick | F2780 Group Sheet | |
| Mother | Idonia Clifford | F2780 Group Sheet | |