1209 - 1245 (36 years)
 | Lord of Dunster Sir John de Mohun, III Aft 1258-1330 |
| Lord of Dunster Sir John de Mohun, III | |
| B: | Aft 1258 |
| Dunster, Somerset, England | |
| D: | 25 Aug 1330 |
| Cornwall, England | |
 | Auda de Tibetot 1276-1324 |
| Auda de Tibetot | |
| B: | 1276 |
| Porchester, Nottinghamshire, England | |
| M: | 1319 |
| Dunster, Somerset, England | |
| D: | 1324 |
| Dunster, Somerset, England | |
| John de Mohun, II 1248-1279 |
| John de Mohun, II | |
| B: | 1248 |
| Dunster, Somerset, England | |
| D: | 11 Jun 1279 |
| Dunster, Somerset, England | |
 | Alinora Petri 1252-1283 |
| Alinora Petri | |
| B: | 1252 |
| Breconshire, Wales | |
| M: | 1268 |
| Dunster, Somerset, England | |
| D: | Jan 1283 |
| Blagdon, Somerset, England | |
 | Joan de Ferrers Abt 1233- |
| Joan de Ferrers | |
| B: | Abt 1233 |
| Derbyshire, England | |
| D: | Addington, Surrey, England |
| Knight of Munster John de Mohun, I 1232-1253 |
| Knight of Munster John de Mohun, I | |
| B: | 1232 |
| Dunster, Somerset, England | |
| M: | Abt 1245 |
| Derby, Derbyshire, England | |
| D: | 1253 |
| Dunster, Somerset, England | |
|
| Sibyl Marshall 1209-1245 |
| Sibyl Marshall | |
| B: | 1209 |
| Pembroke, Pembrokeshire, Wales | |
| D: | 27 Apr 1245 |
| Pembroke, Pembrokeshire, Wales | |
| 5th Earl of Derby Sir William de Ferrers, III | |
| B: | 1200 |
| Derbyshire, England | |
| D: | 24 Mar 1254 |
| Evington, Leicestershire, 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.
