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Surname Bilko (Bilko , Билко , بيلكو) , worldwide, is quite a rare family name. The family name Bilko is characteristic of Equatorial Guinea, where it is quite a rare surname, Slovakia, and Czechia. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Russia, Czechia, and Slovakia. Also, Bilko is the forename as well as the last name.