Deira

Deira, an ancient Saxon division of Anglia, from the Tees to the Humber, and to the West as far as Cumbria. Bernicia, to the north, was afterwards joined with it to form the kingdom of Northumbria, but they were again separated into earldoms. The name gave Pope Gregory the occasion of making his celebrated puns about the Saxon slaves at Rome, who from Angli were to become Angeli, and be plucked de ira Dei.