Anglo-Saxon, term used historically to describe any member of the Germanic peoples who, from the 5th century ce to the time of the Norman Conquest (1066), inhabited and ruled territories that are today part of England and Wales. According to St. Bede the Venerable, the Anglo-Saxons were the descendants of three different Germanic peoples—the Angles, Saxons, and Jutes. By Bede’s account, those peoples originally migrated from northern Germany to the island of Britain in the 5th century at the invitation of Vortigern, a ruler of Britons, to help defend his kingdom against marauding invasions by the Picts and Scotti, who occupied what is now Scotland. Archaeological evidence suggests that the first migrants from the Germanic areas of mainland Europe included settlers from Frisia and antedated the Roman withdrawal from Britain about 410 ce. The peoples of each of the various Anglo-Saxon kingdoms spoke distinctive dialects, which evolved over time and together became known as Old English.