| Father | Thomas FITZWILLIAM - Lord of Emley (1195 - 1266) |
| Mother | Agnes DE BERTRAM (1193 - 1244) |
| Sibling | Margaret FITZWILLIAM (1235 - 1278) |
| Sibling | Albreda FITZWILLIAM (1212 - ) |
| Sibling | Margaret FITZWILLIAM (1214 - ) |
| Sibling | Peter FITZWILLIAM , of Denaby (1216 - ) |
| Sibling | Agnes FITZTHOMAS (1218 - ) |
| Sibling | Sir Thomas I FITZTHOMAS (1221 - 1294) |
| Sibling | Bertha FITZWILLIAM (1222 - ) |
| Sibling | Dionise FITZTHOMAS (1227 - ) |
| Sibling | William FITZTHOMAS (1230 - 1295) |
| Sibling | Agnes FITZWILLIAM (1231 - ) |
| Sibling | Bertha FITZWILLIAM (1233 - ) |
| Sibling | Peter FITZWILLIAM (1235 - ) |
| Sibling | Roger FITZ THOMAS (1235 - ) |
| Sibling | Ranuta FITZWILLIAM (1237 - ) |
| Sibling | Alberda FITZWILLIAM (1242 - ) |