| Male Prince of Gwynedd Owain Gwynedd Ap Gruffydd Mawr |
| Birth | 1100 | , Anglesey, Wales, United Kingdom |
| Death | 28 Nov 1170 | Caernarfon, Caernarvon, Wales, United Kingdom |
| Burial | Bangor Cathedral, Bangor, Caernarvonshire, Wales, United Kingdom |
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| Marriage | ||
| Father | Prince of Gwynedd Gruffydd Ap Cynan Mawr | F1525 Group Sheet | |
| Mother | Angharad, of Tegaingl | F1525 Group Sheet | |
| Female Gwladys Ap Llywarch, of Pembroke |
| Birth | ||
| Death | ||
| Burial | ||
| Father | Lord of Pembroke Llywarch Ap Trahaern | F1550 Group Sheet | |
| Mother | ||
| Male + Iowerth Drwyndwn Ap Owain Mawr |
| Birth | 1125 | Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom |
| Death | 1174 | Pennant Melangell, , Wales, United Kingdom |
| Burial | ||
| Spouse | Margaret, of Powys | F1523 | |
| Marriage | ||