| Father | Robert DE THROCKMORTON II (1231 - 1306) |
| Mother | Prudence de COMPTON (1235 - 1266) |
| Sibling | Simon de THROCKMORTON (1251 - 1315) |
| Sibling | Adam DE THROCKMORTON (1250 - 1298) |
| Sibling | Robert DE THROCKMORTON (1251 - 1280) |
| Sibling | Nicholus DE THROCKMORTON (1255 - ) |
| Sibling | Nicholas DE THROCKMORTON (1257 - 1303) |
| Sibling | Axexander DE THROCKMORTON (1257 - ) |
| Sibling | Alexander DE THROCKMORTON (1259 - 1280) |
| Sibling | Joan DE THROCKMORTON (1260 - ) |
| Sibling | William DE THROCKMORTON (1261 - 1284) |
| Sibling | John DE THROKEMERTON, a Priest (1263 - 1340) |