Then followed in the 7th century the Bessi, a Thracian tribe, who gave their name to the region, and in the 9th the Ugrians, that is to say the ancestors of the present Magyars of Hungary, the country being then known as Atel-kuzu.
The Ugrians were forced farther west by the Turkish tribe of the Petchenegs in the 10th century, and these were succeeded in the 11th century by the Kumans (Comani) or Polovtsians, a kindred Turkish stock or federation.
Amongst the nomadic Ugrians and agricultural Slays of the north their frontier fluctuated widely, and in its zenith Khazaria extended from the Dnieper to Bolgari upon the middle Volga, and along the eastern shore of the Caspian to Astarabad.
The origin of the Khazars has been much disputed, and they have been variously regarded as akin to the Georgians, Finno-Ugrians and Turks.
They appear in European history as White Huns (Ephthalites), White Ugrians (Sar-ogours), White Bulgarians.