| Father | Hopkin ap Hywel Fychan (1280 - 1370) |
| Mother | Gwenllian verch Rhys Foel (1283 - 1380) |
| Sibling | Denise verch Hopkin (1325 - 1402) |
| Sibling | Mawd verch Hopkin (1270 - ) |
| Sibling | Annes ferch Hopkin (1289 - ) |
| Sibling | Efa verch Hopkin (1290 - 1383) |
| Sibling | Joan ferch Hopkin (1291 - ) |
| Sibling | Gwenllian ferch Hopkin (1294 - ) |
| Sibling | Elsbeth ferch Hopkin (1295 - ) |
| Sibling | William Cantelupe (1298 - ) |
| Sibling | Robert Fychan ap Hopkin (1299 - ) |
| Sibling | Annes verch Hopkin (1300 - ) |
| Sibling | Catrin verch Hopkin (1300 - ) |
| Sibling | William ap Hopkin (1300 - ) |
| Sibling | Gwladys verch Hopkin (1302 - 1371) |
| Sibling | Hywel (1315 - ) |
| Sibling | Hywel ap Hopkin (1318 - ) |
| Sibling | Catrin Verch Hopkin (1320 - ) |
| Sibling | Robert ap Hopkin (1320 - ) |
| Sibling | Robert ap Hopkin (1330 - ) |