From Russian богатырь (bogatýr’), from a Turkic language, probably Khazar, from Old Turkic bagatur (“hero”), from Proto-Turkic *bAgatur (“hero”), possibly from Proto-Altaic *mi̯àga ("glory, praise"). Compare Turkish bahadır, Mongolian баатар (baatar), Tatar баһадир (bahadir). Cf. the name of the Xiongnu Chanyu, MC 冒頓 (*maɣu-tur). This Turkic word was borrowed into numerous surrounding languages (Iranian, Mongolian etc., see the literature in E. W. Sewortyan et al.). Modern forms like batɨr, batur are back-borrowings from Mongolian. Forms of the type baxatir - back-borrowings from Persian. Cognate with Middle Mongolian [script?] (maqta-), [script?] (maxta-, “to laud, carol”), from Proto-Mongolic *magta- (“to praise, glorify”), Evenki migdi- ("to be noisy, produce noise"), Oroch magui- ("to shamanize"), from Proto-Tungus-Manchu *m[ia]g-, Middle Korean 말 (māl, “speech”) (from Proto-Korean *mār < *maga-r), Old Japanese 申す (mawos-, “to speak (polite)”) (from Proto-Japonic *màwǝ̀-s-).