| Father | Sir William de FERRERS IV Earl of Derby, High Sheriff of Lancaster (1168 - 1247) |
| Mother | Agnes OF CHESTER (1170 - ) |
| Sibling | Sir William de FERRERS V Earl of Derby Constable of Bolsover Castle (1193 - 1254) |
| Sibling | Eleanor DE FERRERS (1194 - 1274) |
| Sibling | Petronilla DE FERRERS (1195 - ) |
| Sibling | Robert DE FERRERS (1197 - 1279) |
| Sibling | Ranulph DE FERRERS, Parson of St. Michael's on the Wyre (1200 - 1247) |
| Sibling | Thomas DE FERRERS (1202 - 1279) |
| Sibling | Hugh DE FERRERS (1204 - 1257) |
| Sibling | Bertha DE FERRERS (1204 - 1267) |
| Sibling | Agnes DE FERRERS (1212 - ) |
| Sibling | Sybil DE FERRERS - BARONESS OF APPLEBY (1216 - 1247) |