| Father | Male Gronwy "Fychan" ap Gronwy |
| Born | Abt 1226 | of Trecastell, Llangoed, Anglesey, Wales |
| Died | ||
| Buried | ||
| Married | ||
| Father | Gronwy ap Edynfed | F29654 Group Sheet | |
| Mother | Morfudd Verch Meurig | F29654 Group Sheet | |
| Mother | Female Generys Verch Hwfa |
| Born | Abt 1265 | of, Maelor Gymraeg, Denbighshire, Wales |
| Died | ||
| Buried | ||
| Father | ||
| Mother | ||
| Child 1 | Female Myfanwy Verch Gronwy |
| Born | Abt 1286 | of Trecastell, Llangoed, Anglesey, Wales |
| Died | ||
| Buried |
| Child 4 | Female Generys "Fechan" Verch Gronwy |
| Born | Abt 1293 | of Trecastell, Llangoed, Anglesey, Wales |
| Died | ||
| Buried |
| Child 5 | Female Gwenllian "Fechan" Verch Gronwy |
| Born | Abt 1295 | of Trecastell, Llangoed, Anglesey, Wales |
| Died | ||
| Buried |
| Child 6 | Male Llywelyn ap Gronwy |
| Born | Abt 1285 | of Trecastell, Llangoed, Anglesey, Wales |
| Died | Aft 1351 | |
| Buried |
| Child 7 | Male + Madog ap Gronwy |
| Born | Abt 1291 | of Trecastell, Llangoed, Anglesey, Wales |
| Died | ||
| Buried | ||
| Spouse | Margred Verch Robert | F29624 | |
| Married | ||