| Prince of Wales Llywelyn Fawr Ap Iowerth |
| Prince of Wales Llywelyn Fawr Ap Iowerth | |
| B: | 1173 |
| Dolwyddelan, Nantconwy, Wales, United Kingdom | |
| D: | 11 Apr 1240 |
| Joan Plantagenet |
| Joan Plantagenet | |
| B: | 1188 |
| London, Greater London, England, United Kingdom | |
| D: | 2 Feb 1237 |
| Aberconway, Caernarvon, Wales, United Kingdom | |
| Iowerth Drwyndwn Ap Owain Mawr |
| Iowerth Drwyndwn Ap Owain Mawr | |
| B: | 1125 |
| Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom | |
| D: | 1174 |
| Pennant Melangell, , Wales, United Kingdom | |
| Prince of Gwynedd Owain Gwynedd Ap Gruffydd Mawr | |
| B: | 1100 |
| , Anglesey, Wales, United Kingdom | |
| D: | 28 Nov 1170 |
| Caernarfon, Caernarvon, Wales, United Kingdom | |
|