Abt 1065 - 1114 (49 years)
| 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 | |
| 1st Earl of Pembroke Gilbert FitzGilbert de Clare | |
| B: | 21 Sep 1100 |
| Tonbridge, Kent, England | |
| D: | 6 Jan 1148 |
 | Isabel de Beaumont 1102-1147 |
| Isabel de Beaumont | |
| B: | 1102 |
| Leicester, Leicestershire, England | |
| M: | 1130 |
| Tonbridge, Kent, England | |
| D: | 6 Jan 1147 |
| Carmarthen, Carmarthenshire, Wales | |
 | 2nd Earl of Norfolk Roger Bigod 1144-1220 |
| 2nd Earl of Norfolk Roger Bigod | |
| B: | 1144 |
| Norwich, Norfolk, England | |
| D: | 1220 |
| England | |
 | Ida de Tosny 1156-1226 |
| Ida de Tosny | |
| B: | 1156 |
| Norwich, Norfolk, England | |
| M: | Dec 1181 |
| D: | 7 Mar 1226 |
| Norfolk, England | |
 | Juliana de Vere 1108-1199 |
| Juliana de Vere | |
| B: | 1108 |
| Essex, England | |
| D: | 1199 |
| Thetford, Norfolk, England | |
 | 1st Earl of Norfolk Hugh Bigod 1095-1175 |
| 1st Earl of Norfolk Hugh Bigod | |
| B: | 1095 |
| Norfolk, England | |
| M: | Bef 1144 |
| D: | 6 Mar 1175 |
| Thetford, Norfolk, England | |
| 3rd Earl of Oxford Robert de Vere 1164-1221 |
| 3rd Earl of Oxford Robert de Vere | |
| B: | 1164 |
| Colne Engaine, Essex, England | |
| D: | 25 Oct 1221 |
| Colne Engaine, Essex, England | |
 | Isabel de Bolebec 1165-1245 |
| Isabel de Bolebec | |
| B: | 1165 |
| Whitchurch, Buckinghamshire, England | |
| M: | 1183 |
| Hatfield Broad Oak, Essex, England | |
| D: | 4 Feb 1245 |
| Oxford, Oxfordshire, England | |
 | 1st Earl of Oxford Aubrey de Vere 1115-1194 |
| 1st Earl of Oxford Aubrey de Vere | |
| B: | 1115 |
| Essex, England | |
| D: | 26 Dec 1194 |
| London, England | |
 | Countess of Oxford Agnes of Essex Abt 1140-Abt 1200 |
| Countess of Oxford Agnes of Essex | |
| B: | Abt 1140 |
| Rayleigh, Essex, England | |
| M: | 1162 |
| Hatfield Broad Oak, Essex, England | |
| D: | Abt 1200 |
| Oxfordshire, England | |
| Alice de Clare 1091-1163 |
| Alice de Clare | |
| B: | 1 Jan 1091 |
| Essex, England | |
| D: | 1163 |
| Tendring, Essex, England | |
| Aubrey de Vere, II 1080-1141 |
| Aubrey de Vere, II | |
| B: | 1080 |
| Essex, England | |
| M: | 1108 |
| D: | 15 May 1141 |
| London, 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 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 | |
|
| Lord of Clare and Tunbridge Gilbert FitzRichard de Clare, II | |
| B: | Abt 1065 |
| Clare, Suffolk, England | |
| D: | 17 Nov 1114 |
| Wales | |
| Adelize 'Alice' de Clermont 1058-1117 |
| Adelize 'Alice' de Clermont | |
| B: | 1058 |
| Northamptonshire, England | |
| M: | Bef 1090 |
| D: | 1117 |
| Clare, Suffolk, 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.
