1130 - 1176 (45 years)
 | 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 | |
 | Countess of Cornwall Isabel Marshall 1200-1240 |
| Countess of Cornwall Isabel Marshall | |
| B: | 9 Oct 1200 |
| Pembroke, Pembrokeshire, Wales | |
| D: | 17 Jan 1240 |
| Hertfordshire, England | |
 | 1st Earl of Cornwall Richard Plantagenet 1209-1272 |
| 1st Earl of Cornwall Richard Plantagenet | |
| B: | 5 Jan 1209 |
| Winchester, Hampshire, England | |
| M: | 30 Mar 1231 |
| Buckinghamshire, England | |
| D: | 2 Apr 1272 |
| Berkhamsted, Hertfordshire, England | |
| Eighth Earl of Clare, Sixth Earl of Hertford, 6th Earl of Gloucester Richard de Clare, IV | |
| B: | 4 Aug 1222 |
| England | |
| D: | 14 Jul 1262 |
| Waltham, Kent, England | |
 | Maud de Lacy 1223-1289 |
| Maud de Lacy | |
| B: | 25 Jan 1223 |
| Lincoln, Lincolnshire, England | |
| M: | 2 Feb 1238 |
| D: | 10 Mar 1289 |
| Lincoln, Lincolnshire, England | |
 | Isabel de Clare 1226-1264 |
| Isabel de Clare | |
| B: | 8 Nov 1226 |
| Tewkesbury, Gloucestershire, England | |
| D: | 10 Jul 1264 |
| Cleveland Port, Yorkshire, England | |
| 5th Lord of Annandale Sir Robert de Brus, V | |
| B: | 1210 |
| Lochmaben, Dumfries-shire, Scotland | |
| D: | 31 May 1295 |
| Lochmaben, Dumfries-shire, Scotland | |
| 4th Earl of Hertford and 5th Earl of Gloucester Gilbert de Clare, III | |
| B: | 1180 |
| Hertford, Hertfordshire, England | |
| M: | 9 Oct 1217 |
| D: | 25 Oct 1230 |
| St Laurent, Gironde, Aquitaine, France | |
| 4th Countess of Pembroke Isabella de Clare | |
| B: | Feb 1172 |
| Pembroke, Pembrokeshire, Wales | |
| D: | 14 May 1220 |
| Pembroke, Pembrokeshire, Wales | |
| 1st Earl of Pembroke William Marshall, the Elder | |
| B: | 12 May 1146 |
| Pembrokeshire, Wales | |
| M: | Aug 1189 |
| Tower of London, London, England | |
| D: | 14 May 1219 |
| Caversham, Oxfordshire, England | |
|
| 2nd Earl of Pembroke, Lord of Leinster, and Justiciar of Ireland Richard FitzGilbert de Clare 1130-1176 |
| 2nd Earl of Pembroke, Lord of Leinster, and Justiciar of Ireland Richard FitzGilbert de Clare | |
| B: | 21 Sep 1130 |
| Tonbridge, Kent, England | |
| D: | 20 Apr 1176 |
| Pembroke, Pembrokeshire, Wales | |
| Princess of Leinster Aoife 'Eve' MacMurrough | |
| B: | 26 Apr 1145 |
| Ireland | |
| M: | 26 Aug 1171 |
| Waterford County, Ireland | |
| D: | 26 Aug 1188 |
| Waterford, Waterford, Ireland | |
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.
