1094 - 1136 (42 years)
| 4th Earl of Hertford and 5th Earl of Gloucester Gilbert de Clare, III | |
| B: | 1180 |
| Hertford, Hertfordshire, England | |
| D: | 25 Oct 1230 |
| St Laurent, Gironde, Aquitaine, France | |
 | Countess of Cornwall Isabel Marshall 1200-1240 |
| Countess of Cornwall Isabel Marshall | |
| B: | 9 Oct 1200 |
| Pembroke, Pembrokeshire, Wales | |
| M: | 9 Oct 1217 |
| D: | 17 Jan 1240 |
| Hertfordshire, England | |
 | Earl of Clare Richard de Clare 1153-1217 |
| Earl of Clare Richard de Clare | |
| B: | 1153 |
| Tonbridge, Kent, England | |
| D: | 1217 |
| Oxfordshire, England | |
| Countess of Hertford and Gloucesterde Mellent Caen Amice FitzWilliam | |
| B: | 1160 |
| Tewkesbury, Gloucestershire, England | |
| M: | 1179 |
| Hertford, Hertfordshire, England | |
| D: | 1 Jan 1224 |
| Devon, England | |
| Lady of Streatley and Dunster Lady Hawise FitzGeoffrey | |
| B: | 1210 |
| Shere, Surrey, England | |
| D: | 8 Aug 1247 |
| Earls Colne, Essex, England | |
 | 5th Baron of Dunster Sir Reynold de Mohun, II Abt 1206-1258 |
| 5th Baron of Dunster Sir Reynold de Mohun, II | |
| B: | Abt 1206 |
| Dunster, Somerset, England | |
| M: | 1227 |
| Dunster, Somerset, England | |
| D: | 20 Jan 1258 |
| Devon, England | |
 | Lady Munchensy Eveline de Clare 1160-1225 |
| Lady Munchensy Eveline de Clare | |
| B: | 1160 |
| Tonbridge, Kent, England | |
| D: | 4 Jun 1225 |
| Hereford, Herefordshire, England | |
 | 4th Earl Of Essex Geoffrey FitzPiers 1162-1213 |
| 4th Earl Of Essex Geoffrey FitzPiers | |
| B: | 1162 |
| Wallend, Essex, England | |
| M: | 1204 |
| D: | 14 Oct 1213 |
| Norfolk, England | |
| 2nd Earl of Hertford Roger de Clare 1116-1173 |
| 2nd Earl of Hertford Roger de Clare | |
| B: | 1116 |
| Tonbridge, Kent, England | |
| D: | 1173 |
| Oxfordshire, England | |
| Countess Arundel Matilda 'Maud' de St Hilary | |
| B: | 1132 |
| Walsingham, Norfolk, England | |
| M: | 1153 |
| Norfolk, England | |
| D: | 24 Dec 1193 |
| Buckenham, Norfolk, England | |
|
| Lord of Clare, Lord of Tonbridge, and Lord of Cardigan Richard FitzGilbert de Clare | |
| B: | 1094 |
| Hertford, Hertfordshire, England | |
| D: | 15 Apr 1136 |
| Abergavenny, Monmouthshire, Wales | |
 | Alice de Meschines 'Adeliza' de Gernon 1094-1128 |
| Alice de Meschines 'Adeliza' de Gernon | |
| B: | 1094 |
| Hertford, Hertfordshire, England | |
| M: | 1115 |
| Livry, Calvados, Basse-Normandie, France | |
| D: | 1128 |
| Abergavenny, Monmouthshire, Wales | |
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.
