High Quality Content by WIKIPEDIA articles! Sigeberht of East Anglia (also known as Saint Sigebert), (Old English: Sigebryht) was a saint and a king of East Anglia, the Anglo-Saxon kingdom which today includes the English counties of Norfolk and Suffolk. He was the first English king to receive a Christian baptism and education before his succession and the first to abdicate in order to enter the monastic life. The principal source for Sigeberht is Bede`s Ecclesiastical History of the English People, which was completed in the 730s.