| b 1139, Of, Beaumont, , France | Roger De Beaumont, [Count Beaumont] | > | Robert De Beaumont, [Count] | Adeliza Meulent, [Countess] | > |
| Waleran Count Of Meulan, [Earl] | b 1040 | Hugh 'The Great' Crepi | > | |
| | b 1104 | Isabel Elizabeth De Vermandois | Adelaide Countess Of Vermandois | > | |
| Robert De Beaumont, [Count] | d 10 Apr 1166 | b 1081 | Simon I Montfort, [Seigneur de] | > |
| |b 1130 | | | Amaury De Montfort | Agnes D' Evreux | > |
| |d Oct1207 | Agnes De Montfort, [Countess] | b 1070 | Anselm De_Garlende | > |
| | | b 1122 | Agnes De Garlende | De Montlhery | > |
| Joan Harcourt | d 15 Dec 1187 | b 1095 | William I 'The_Conqueror' England, [Duke] | > |
| |Robert Harcourt | Henry I 'Beauclerc' England, [King] | Matilda Countess Of Flanders, [Queen] | > | |m 1158 | Rainald De Dunstanville, [Earl] | b 1070 | Robert Corbet, [Sir Knight] |
| | | |b ABT 1110 1115 | Sibyl Corbet | ||
| Maud De Dunstanville, [Countess] | d 01 Jul 1175 | b 1077 | ||
| b 1143 | | | William Fitzrichard | ||
| Beatrice Fitzwilliam, [Countess] | b 1084 | |||
| b 1114 | ||||