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Surname Hilko (Hilko , Хилько , Хилко ) , across the world, is quite a common cognomen. The surname Hilko is characteristic of Belarus, where it is quite a common surname, Latvia, where it is quite a rare surname, and Ukraine. In absolute terms, the name is most common in Eastern Europe, particularly Russia, Ukraine, and Belarus. Much less frequently, Hilko is the forename as well as the last name.