 Æthelberht ( Old English : Æðelbrihte ) , also called Saint Ethelbert the King , ( died 20 May 794 at Sutton Walls , Herefordshire ) was an eighth @-@ century saint and a king of East Anglia , the Anglo @-@ Saxon kingdom which today includes the English counties of Norfolk and Suffolk . Little is known of his reign , which may have begun in 779 , according to later sources , and very few of the coins issued during his reign have been discovered . It is known from the Anglo @-@ Saxon Chronicle that he was killed on the orders of Offa of Mercia in 794 . 
