 At the time of Cerball's birth Osraige lay within the province and kingdom of Munster, ruled by the Eóganachta from the royal centre of Cashel.Osraige lay at the extreme eastern edge of Munster bordering the neighbouring province of Leinster.For a period in the seventh century, most of southern Osraige was ruled by the Corcu Loígde, rulers of Munster before the coming of the Eóganachta.