Northumbria was originally composed of the union of two independent kingdoms, Bernicia and Deira.
King Edwin of Deira (616-32) accepted Christianity in 627 and was Bretwalda of England from 627-632.
The Heptarchy:
Northumbria has been adopted by the English Tourist Board as the name of a region in the North East of England, which comprises of Northumberland, County Durham and Tees Valley (cleveland). It is also used as another name for Northumberland in then name of Northumbria Police.