| Eltern | Geschwister | Kinder |
| Gwladys Llewelyn | ||
| Ellen Iorwerth | ||
| Gruffudd Llywelyn | ||
| Gwenllian Llywelyn | ||
| Margaret ap Llewelyn | ||
| Dafydd Llywelyn | ||
| Llywelyn Wales | Helena Wales | |
| Margaret | John De Trafford | |
| Tangwystl Llywarch | Angharad Llywelyn | |
| Miss Llywelyn | ||
| Partner | ||
| Henry De Trafford |