When Edwin of Deira returned to power in 617, Ceretic was expelled, supposedly due to complicity in the poisoning of Hilda's father, and his kingdom was annexed to the Kingdom of Northumbria. He is probably the Ceretic whose death is recorded in the Annales Cambriae in 616 (which should be corrected to 617 or soon afterwards).
Edwin of Deira regained power in 617, Ceretic was expelled, allegedly due to involvement in the poisoning of Hilda's father, and his kingdom was annexed to the Kingdom of Northumbria. He is probably the Ceretic whose death is recorded in the Annales Cambriae in 616 (which should be corrected to 617 or shortly thereafter).