| Father | Walter DE GAUNT Lord of Folkingham, Earl of Lincolnshire (1080 - 1138) |
| Mother | Mathilde DE PENTHIÈVRE (1090 - 1135) |
| Sibling | Alice de GAUNT Countess of Leicester (1109 - 1197) |
| Sibling | William DE LINDSAY of Ercildoun (1106 - 1147) |
| Sibling | Isabel DE GANT (1111 - ) |
| Sibling | Matilda DE GAND (1114 - 1176) |
| Sibling | Agnes DE GAND (1117 - 1155) |
| Sibling | Baldwin DE GANT Canon of Bridlington (1120 - ) |
| Sibling | Robert DE GANT OR GAUNT Lord of Aalst, Folkingham and Bridlington (1122 - 1191) |
| Sibling | Walter DE GANT (1124 - ) |
| Sibling | Gilbert DE GANT 1st Earl of Lincoln (1126 - 1156) |
| Sibling | Geoffrey De GAUNT (1130 - ) |