Abt 1014 - 1081 (~ 67 years)
| Robert DE BEAUMONT, Iii Earl Of Leicester | |
| B: | 1121 |
| Of Co. Leicestershire, ENG | |
| D: | 31 Aug 1190 |
| Durazzo, , GRC | |
| Petronill Or Pernell DE GRANTMESNIL | |
| B: | Abt 1134 |
| Of Eng | |
| M: | Abt 1155 |
| D: | 1 Apr 1212 |
| Leicester, , ENG | |
| Hawise DE BEAUMONT | |
| B: | 1129 |
| D: | 1183 |
| William FITZROBERT | |
| B: | 1116 |
| D: | 1183 |
| Robert DE BEAUMONT, Earl Of Leicester | |
| B: | 1104 |
| Normandy, , , FRA | |
| D: | 5 Apr 1168 |
| Amice DE MONTFORT | |
| B: | Abt 1100 |
| , , , England | |
| M: | Aft Nov 1120 |
| D: | Aft Apr 1168 |
| Waleran Of Meulan DE BEAUMONT, Earl Of Worcester | |
| B: | 1104 |
| D: | 1166 |
| Richard DE CLARE, "Strongbow" | |
| B: | 1125 |
| D: | 1176 |
| Isabelle DE BEAUMONT | |
| B: | Abt 1104 |
| D: | Aft 1172 |
| Gilbert Fitzgilbert DE CLARE, "Strongbow" | |
| B: | 1100 |
| D: | 1148 |
| Sir Robert, 1St Earl Of Leister DE BEAUMONT | |
| B: | 1046 |
| Of Beaumont, , FRA | |
| D: | 5 Jun 1118 |
| Of Preaux, , FRA | |
| Isabelle (Elizabeth) DE VERMANDOIS | |
| B: | 1081 |
| Vermandois, , FRA | |
| M: | 1096 |
| D: | 17 Feb 1131 |
| St. Nicaise, Meulan, FRA | |
| Amica DE GAEL | |
| B: | 1100 |
| D: | 1168 |
|
| Adeline DE MEULAN | |
| B: | Abt 1014 |
| Of Pontaudemer, , FRA | |
| D: | 1081 |
| Roger DE BEAUMONT | |
| B: | Abt 1022 |
| Of Pontaudemer, , FRA | |
| D: | 1094 |
