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Surname Ammann (阿曼 , Ammann , アマン , among others...) , worldwide, is a common cognomen. The surname Ammann is characteristic of Switzerland, where it is a common surname, Liechtenstein, where it is quite a common surname, and Eswatini. Not in comparison with a country's population, it most frequently occurs in Switzerland, Germany, and the United States. Very seldom, Ammann is the forename as well as the last name.