| Roger de Quency Earl of Winchester |
|
| Helena |
| William (III) de Ferrers Earl of Derby | Margaret de Quency |
| b. ca 1193 d. 24 Mar 1254, Evington, Nr Leicester . 5th earl. Constable of Bolsover castle. |
b. bef 1223 d. bef 12 Mar 1281 . 1st dau & co-heir. Constable of Scotland. |
| Spouses: 1, 2 |
| Robert (III) de Ferrers Earl of Derby > Joan de Ferrers < Sir William Ferrers |