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Last name Blasko (Blasko , Blaško , Бласко ) , worldwide, is quite a common cognomen. The last name Blasko is characteristic of Eastern Europe, particularly Slovakia, where it is quite a common surname, Hungary, where it is quite a rare surname, and Czechia. In absolute terms, the name is most common in Slovakia, the United States, and Hungary. Very seldom, Blasko is the forename as well as the last name.