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Last name Hanko (Hanko , Ханько , Ханко ) , all around the world, is quite a common family name. The surname Hanko is characteristic of Eastern Europe, particularly Slovakia, where it is quite a common surname, Hungary, and Czechia, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Slovakia, Hungary, and the United States. Much less frequently, Hanko is the forename as well as the last name.