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Last name Bolz (Bolz , Bolec , Больц ) , worldwide, is a common surname. The cognomen Bolz is habitual in Western Europe, particularly Germany, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Austria, where it is a rare surname. In absolute terms, it most frequently occurs in Germany, the United States, and Switzerland. Much less frequently, Bolz is the forename as well as the last name.