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Family name Koba (Koba , コバ , Коба ) , throughout the world, is a common surname. The last name Koba is habitual in Georgia, where it is a common surname, Bosnia and Herzegovina, where it is quite a common surname, and Ukraine, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Georgia, Ukraine, and India. Also, Koba is the forename as well as the last name.