Lost control of Gwynedd to Hywel Dda in 942 on the death of his father. He regained it on Hywel's death in 950, but was engaged in warfare with his brother Ieuaf until 969. Ieuaf is reported by the Brut to have been captured, blinded, and hanged. Four years later, Iago was one of the princes who did homage to Edgar on the Dee at Chester. However, in 979 he was dispossessed by Ieuaf's son, Hywel.
From The Kings and Queens of Britain in Oxford Reference.
Subjects: British History.