Origin of bulgar
- Medieval Latin Bulgarus from Greek Boulgaros from Turkic bulghar of mixed origin, promiscuous from bulgamaq to mix
From American Heritage Dictionary of the English Language, 5th Edition
- From a designation Volgar in some language, meaning "Men of the Volga", the river along which the tribe lived until the 6th century.
- From Turkic *bulɣar (“of mixed origin”), from *bulɣamak (“to mix”).
- From the self-designation in Old Bulgarian, Блугарину (Blugarinu).