| Male Prince of Gwynedd Iago Ap Idwal Mawr |
| Birth | 974 | Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom |
| Death | 1039 | Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom |
| Burial | ||
| Marriage | ||
| Father | King of North Wales Idwel Fychan Ap Meurig Mawr | F1528 Group Sheet | |
| Mother | ||
| Female Avendreg Ferch Gwair, of Powys |
| Birth | 984 | Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom |
| Death | Yes, date unknown | |
| Burial | ||
| Father | ||
| Mother | ||
| Male + Prince Of North Wales Cynan Ap Iago Mawr |
| Birth | 1014 | |
| Death | 1063 | |
| Burial | ||
| Spouse | Ranult, of Dublin | F1526 | |
| Marriage | ||