| 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 | |
| King of North wales Trahaern Ap Caradoc | |
| D: | 1079 |