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Surname 洛瑟 (Loser , 洛瑟) , in the world, is quite a rare cognomen. The surname 洛瑟 is habitual in Western Europe, particularly Switzerland, where it is quite a common surname, Austria, where it is quite a rare surname, and Germany. In absolute terms, the name is most common in Germany, Switzerland, and the United States. Much less frequently, 洛瑟 is the forename as well as the last name.