| | Lord Thomas Basset 1125–1182 Alice de Dunstanville 1120–1186 | | | | | | | | | Robert II de Oilly 1070–1142 Edith Sigulfson de Greystoke 1080–1172 | | |
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| | | Alan Reginald de Dunstanville 1080–1150 Emma de Langetot 1090–1157 | | | | Reginald Robert de Dunstanville 1054–1124 Adeliza Alicia de Isle 1058–1130 | | |
| | | Ralph de Langetot 1043–1099 Princess Cecelia of England 1056–1126 | | |
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