 By the beginning of the 7th century, southern England was almost entirely under the control of the Anglo-Saxons.These peoples, who are known to have included Angles, Saxons, Jutes and Frisians, began to arrive in Britain in the 5th century.By 600, a number of kingdoms had begun to form in the conquered territories, including the Kingdom of the East Angles, an Anglo-Saxon kingdom which today includes the English counties of Norfolk and Suffolk.