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Family name Belko (Belko , Белько , Белко ) , throughout the world, is quite a common last name. The family name Belko is characteristic of Belarus, where it is quite a common surname, Slovakia, and Bosnia and Herzegovina, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Eastern Europe, particularly Belarus, Slovakia, and Russia. Much less frequently, Belko is the forename as well as the last name.