The Avars were a powerful semi-nomadic group. Their leader was called a Khagan. They could be found in Central and Eastern Europe during the 6th century. They were a union of White Huns and Rourans. Avars of the Caucasus are remnants of White Huns, have a direct contact with Avar Empire of Europe. They were predominantly ethnic Mongols.
- Vovin, Alexander. "A Sketch of the Earliest Mongolic Language: the Brāhmī Bugut and Khüis Tolgoi Inscriptions". International Journal of Eurasian Linguistics. 1 (1): 162–197. ISSN 2589-8825.