Bulgars

The Bulgars (also Bulghars, Bulgari, Bolgars, Bolghars, Bolgari; Proto-Bulgarians) were semi-nomadic warrior Turkic tribes who flourished in the Pontic-Caspian steppe and the Volga region during the 7th century. Emerging as nomadic equestrians in the Volga-Ural region, according to some researchers their roots can be traced to Central Asia. During their westward migration across the Eurasian steppe the Bulgars absorbed other ethnic groups and cultural influences, including Hunnic, Iranian and Indo-European people. Modern genetic research on Central Asian Turkic people and ethnic groups related to the Bulgars points to an affiliation with western Eurasian and European populations. The Bulgars spoke a Turkic language, i.e. Bulgar language of Oghuric branch. They preserved military titles, organization and customs of Eurasian steppes, as well as pagan shamanism and belief in the sky deity Tangra.

The Bulgars became semi-sedentary during the 7th century in the Pontic-Caspian steppe, establishing the polity of Old Great Bulgaria c. 635, which was absorbed by the Khazar Empire in 668 AD.

In c. 679, Khan Asparukh conquered Scythia Minor, opening access to Moesia, and established the First Bulgarian Empire. In the Balkans, the Bulgars became a political and military elite, and merged with previous populations, such as the Thracians and Vlachs, and were Slavicized, thus forming modern Bulgarians.

...
Wikipedia