Elmet emerged from Roman Britain as a British kingdom. The "Elmetsæte" (people of Elmet) were listed in Tribal Hidage as 600 hides. Elmet may have originally been a of the Brigantes. Ceredig, the last king of Elmet, was defeated in 617 by Edwin of Deira around Leeds in the south Pennines. Edwin expelled Ceredig from Elmet and from that time on Elmet was a part of Northumbria.