THE BARBARIANS
 

The Greeks called foreigners in general Barbarians.

If a historian talks about Barbarians, he probably refers to any or all of the following tribes:

The Goths, the Ostrogoths, the Alemanni, the Franks, the Visigoths, the Burgundians, the Vandals, the Saxons, the Lombards, the Huns, the Angles, the Suebi, the Jutes, the Picts, the Scots etc.

And here is the map of the Germanic Migrations and Conquests, 150-1066:

GERMANIC MIGRATIONS AND CONQUESTS
Click map to enlarge

Roman Empire 5th Century: Routes of the Barbarian Invaders