| William III De Ferrers (maid. name 5th Earl of Derby Sheriff of Lancaster) | |
| B: | 1193 |
| Derby, Derbyshire, England | |
| D: | 24 Mar 1254 |
| Evington, Leicestershire, , England | |
| Margaret DeQuincy |
| Margaret DeQuincy | |
| B: | 1208 |
| Lincoln, Lincolnshire, , England | |
| D: | 1258 |
| Clerkenwell, London, , England | |