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Last name Harko (Harko , Харько , Харко ) , around the globe, is quite a rare family name. The family name Harko is habitual in Belarus, where it is quite a rare surname, Ukraine, and Estonia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Ukraine, Russia, and Belarus. Likewise, Harko is the forename as well as the last name.