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Cognomen Dulko (Dulko , 杜高 , Дулко ) , throughout the world, is quite a rare surname. The family name Dulko is characteristic of Lithuania, where it is quite a rare surname, Belarus, and Ukraine, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Belarus, Ukraine, and Poland. Likewise, Dulko is the forename as well as the last name.