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Surname 科洛夫 (Kolov , 科洛夫, Koloff ) , globally, is quite a rare family name. The surname 科洛夫 is characteristic of Bulgaria, where it is quite a rare surname, Serbia, where it is a rare surname, and Uzbekistan. Not in comparison with a country's population, this name is the most popular in Bulgaria, Uzbekistan, and the United States.