| b 1161, Of, Leicester, Leicestershire, England | Roger De Beaumont, [Count Beaumont] | > | Robert De Beaumont, [Count] | Adeliza Meulent, [Countess] | > |
| Robert II De Beaumont, [Earl] | b 1040 | Hugh 'The Great' Crepi | > | |
| | b 1104 | Isabel Elizabeth De Vermandois | Adelaide Countess Of Vermandois | > | |
| Robert III De Beaumont, [Earl Leicester] | d 05 Apr 1168 | b 1081 | ||
| |b 1130 | | | Ralph De Waiet, Earl of Norfolk | ||
| |d 31 Aug 1190 | Amice De (Uta) Gael_(Waiet), [Countess] | b 1080 | William Fitzosborne, Earl of Hereford | |
| | | b 1108 | Emma Fitzosborne | Adeliza De Toenry | > |
| Geoffrey De Beaumont | b 1082 | Hugh De Grentmesnil, Lord of Hinckley | > | |
| | | Ivo De Grentmesnil | Alice Adeliza De Beaumont | | | Hugh II De Grentmesnil, Baron | b 1064 | Gilbert De Gaunt | > |
| | | |b 1092 | Felia De Gaunt | Alice De Montfort | > |
| Petronilla Grentmesnil | 61 27 May 1936 | b 1070 | ||
| b 1134 | | | |||
| d 01 Apr 1212 | Mrs. Hugh De Grentmesnil | |||
| b 1105 | ||||