Where does “Болгар” come from?

Болгар (Mongolian) comes from Russian Болга́рия, from Bulgarian Бълга́рия, from Greek Βουλγαρία.

Ancestry of “Болгар”, step by step

StepLanguageWordMeaning
1RussianБолга́рия—
2BulgarianБълга́рия—
3GreekΒουλγαρία—
Every word from Greek Βουλγαρία →Every word from Bulgarian Бълга́рия →Every word from Russian Болга́рия →