| Eltern | Geschwister | Kinder |
| Gwladys Llewelyn | ||
| Ellen Iorwerth | ||
| Gruffudd Llywelyn | ||
| Gwenllian Llywelyn | ||
| Margaret ap Llewelyn | ||
| Llywelyn Wales | Dafydd Llywelyn | |
| Helena Wales | Hawise Quincy | |
| Joan Plantagenet | Margaret | |
| Angharad Llywelyn | ||
| Miss Llywelyn | ||
| Partner | ||
| Robert Quincy |