Bulgars

Bulgars (also Bolgar) - thought to have been originally a Pamirian people of Central Asia whose branches became slavicized & perhaps also Turkic over time. The Turkic etymology most often given to their name is that it derives from "Bulgha" meaning mixed, though it might also be from Varkun.

The simplified account is that Bolgars moved west from the lower-middle Volga river AD to control the second Avar Dynasty of Onoguria in the Ukraine by the mid-7th century. The group subsequently split into two.

The Western Bulgars giving their name to present-day Bulgaria, where they assimilated with the land's earlier Slavic settlers after subjugating the country in 680.

The Eastern Bulgars (sometimes Bolgari) remained a powerful force in the Volga region, eventually merging with local Tatar peoples. Chuvash language is thought to be one descendant of old Bulgar language while Balkar is thought to be another.

Tribes considered to have been Bolgaric in origin include:

Utighur
Kutrighur (Kotrags)
The Kuber Varkuni
Asparukh's Horde
Altasek's Horde
The Unok-vndur federation