(c.583-633) King of NorthumbriaNorthumbria Northumbria was an early medieval Anglian kingdom in what is now Northern England and South Scotland.. His marriage to Ethelburga, a ChristianChristian Name originally given to disciples of Jesus by outsiders and gradually adopted by the Early Church to designate all members of the church. princess of the Kingdom of Kent in 625, who brought her chaplain Paulinus with her, was followed in 627 by his baptismBaptism The Sacramental rite of admission into the Christian Church. The candidate is immersed in or sprinkled with water in the name of the Trinity and may also be anointed with oil. in YorkYork 1. A Roman city and early centre of Christianity. 2. Diocese and province under the leadership of the Archbishop of York. in a specially-constructed baptistery. He appointed Paulinus BishopBishop Bishops exercised pastoral care over a diocese and authority to confirm and ordain of York, and made his kingdom officially Christian. His defeat and death at Heathenfield on 12 October 633 at the hands of the paganPagan Derived from Latin paganus, the Roman term for a rural dweller, this word came to be applied to those who were not Christian, particularly the followers of the classical religion of Greece and Rome and those who followed the pre-Christian religions of Europe kings Penda and Cadwallon led to his kingdom being broken up. His feastFeast Special liturgical celebration to commemorate an event or saint. day is 12 October.