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Surname Bonko (Bonko , Бонко , Бонько ) , worldwide, is a rare last name. The surname Bonko is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname, Belarus, and Czechia, where it is a rare surname. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Belarus, Slovakia, and Ukraine. Likewise, Bonko is the forename as well as the last name.