Northumbria ( historically , Old English : Norþhymbra rīce , Modern English : Kingdom of Northumbria ) was a medieval Anglian kingdom , in what is now northern England and south-east Scotland , becoming subsequently an earldom in a unified English kingdom .
The Kingdom of Northumbria ( Old English : Norþhymbra rīce ) , was a medieval kingdom of the Angles , in what is now northern England and south-east Scotland .