Today Turkic languages are divided into 3 main large dialects like Oghuz, Qarluq, Qipchaq and relatively small dialects such as Halač, Southern Siberian Turkic, Chuvash, and Yakut (Saha). Each or most of these dialects are the followers of the language of the ancient Turkic – “the language of the Ork-hon-Yenisey inscriptions”, i.e. according to some Turkologists, they are the di-rectly follower of the Common Turkic, and some of them different from these languages. Especially, this is very obvious in languages of Chuvash and in lan-guage of Volga Bulgarians of the Middle ages, for them the terms of “the fol-lowers of proto-Turkic language” or “a branch of the Hun language” are widely accepted. In this article, the terms “proto-Turkic” or “Hun language” the author try to analyze the questions what lies the behind these terms and why Altaic scholars or Turkologists came to conclusion that the aforementioned dialects are considered to be Proto-Turkic.