| Father | Gruffudd ap Maredudd (1270 - ) |
| Mother | Alice ferch ALO (1304 - ) |
| Sibling | Maredudd Ddu AP GRUFFUDD of Arwystli (1325 - ) |
| Sibling | Griffri ap GRUFFYDD (1303 - ) |
| Sibling | Ieuan ap GRUFFUDD (1303 - ) |
| Sibling | Philip ap GRUFFUDD (1304 - ) |
| Sibling | Gruffydd Ddu ap GRUFFYDD (1309 - ) |
| Sibling | Ieuan ap GRUFFUDD (1312 - ) |
| Sibling | Philip ap GRUFFUDD (1314 - ) |
| Sibling | Denis ferch GRUFFUDD (1315 - ) |
| Sibling | Gwenhwyfar FERCH GRUFFYDD (1316 - 1355) |
| Sibling | Annes Verch GRUFFUDD (1316 - ) |
| Sibling | Denis Verch GRUFFUDD (1320 - ) |
| Sibling | GRUFFYDD ( - ) |