The history of the English language really started with the arrival of
three Germanic tribes who invaded Britain during the 5th century AD.
These tribes, the Angles, the Saxons and the Jutes, crossed the North
Sea from what today is Denmark and northern Germany. At that time the
inhabitants of Britain spoke a Celtic language. But most of the Celtic
speakers were pushed west and north by the invaders - mainly into what
is now Wales, Scotland and Ireland. The Angles came from "Englaland" and their language was called "Englisc" - from which the words "England" and "English" are derived