| Eltern | Geschwister | Kinder |
| Owain Gruffydd | ||
| Gwenllian Owain | Gwenwynwyn Owain | |
| Gwladus Llywarch | Maelgwn Owain | |
| Rhirid Owain | ||
| Gwenllian Owain | ||
| Madog Owain | ||
| Dafydd Owain | ||
| Cynan Owain | ||
| Iorwerth Owain | ||
| Cadell Owain | ||
| Einion Owain | ||
| Cynwrig Owain | ||
| Cynwrig Owain | ||
| Angharad Owain Gwynnedh | ||
| Partner | ||
| Owain Gruffudd |