The article discusses the early stage of the ethnogenesis of Bulgars in Eastern Europe. The author connects them main Hun’s ethno-political association (Akaziri, Hilandurs, Hunugurs etc.) that emerged in Eastern Europe after the death of the leader of the Huns of Attila. Part of coming to the West is the conglomerate of tribes came from the region of the Sayan-Altai, part of the areas of North-West China (the Tarim river) and the Eastern Kazakhstan. Part of the Bulgars had a lot of former Iranian population of the steppes and even Toharian population of the oases of Xinjiang (Tarim region). In Eastern Europe they mixed with the various Hun’s tribes and local Iranian substratum. In 475 AD marked the latest attack on the Lower Danube, the Huns, which was repelled by the Byzantines. At the same time sources say the appearance on the Danube, later known Bulgars. Standing at the head of the Black Sea the Huns Ernak, son of Attila, obviously, they were defeated and either resigned, or moved away in the more Eastern region.with the nomadic tribes of Onogurs, Saragurs and Urogs who came from the East around 463 AD. After they defeated