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Surname Stier (Setir , Stier , 斯蒂尔 ) , in the entire world, is a common last name. The last name Stier is characteristic of Germany, where it is quite a rare surname, Hungary, and Switzerland. Not in comparison with a country's population, it is commonest in Germany, the United States, and Argentina. Much less frequently, Stier is the forename as well as the last name.