 Male5th Earl of Derby Sir William de Ferrers, III |
| Birth | 1200 | Derbyshire, England  |
| Death | 24 Mar 1254 | Evington, Leicestershire, England |
| Burial | Warwickshire, England |
|
| Marriage | ||
| Other Spouse | Margaret de Quincy | F5227 | |
| Marriage | ||
| Father | 4th Earl of Derby Sir William de Ferrers, II | F5189 Group Sheet | |
| Mother | Agnes de Kevelioc | F5189 Group Sheet | |
 FemaleSibyl Marshall |
| Birth | 1209 | Pembroke, Pembrokeshire, Wales |
| Death | 27 Apr 1245 | Pembroke, Pembrokeshire, Wales |
| Burial | ||
| Father | 1st Earl of Pembroke William Marshall, the Elder | F2753 Group Sheet | |
| Mother | 4th Countess of Pembroke Isabella de Clare | F2753 Group Sheet | |
| Female Joan de Ferrers |
| Birth | Abt 1233 | Derbyshire, England |
| Death | Addington, Surrey, England |
|
| Burial | ||
| Spouse | Knight of Munster John de Mohun, I | F3521 | |
| Marriage | Abt 1245 | Derby, Derbyshire, England |
We make every effort to document our research. There is a lot of information that I do not have, and I know there are mistakes in this tree. My feelings will not be hurt if you give me corrections or additional information, especially if you can provide sources for the information.
