Ieuaf, perhaps a nickname representing Idwal ap Idwal to distinguish him from his father Idwal Foel, was joint king of Gwynedd in northern Wales from 950 to 969 with his brother Iago ab Idwal. He possibly also ruled Powys for some time.
- Occupation
- sovereign
- Position held
- King of Gwynedd
- Born
- 915
- Died
- 988, 969
