| Male Idwal Foel Ap Anarawd Mawr |
| Birth | 883 | Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom |
| Death | 942 | |
| Burial | ||
| Marriage | 915 | |
| Father | Prince of Gwynedd Anarawd Ap Rhodri Mawr | F1531 Group Sheet | |
| Mother | ||
| Female Avandreg Mawr |
| Birth | 888 | |
| Death | Yes, date unknown | |
| Burial | ||
| Father | King of Powys Merfyn Ap Rhodri Mawr | F1415 Group Sheet | |
| Mother | ||