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Last name Muster (Must , Muster , Мустер ) , throughout the world, is quite a common cognomen. The last name Muster is habitual in Estonia, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Austria. Not in comparison with a country's population, it is the most numerous in Germany, Pakistan, and Switzerland. Also, Muster is the forename as well as the last name.