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Family name Rohner (Rohner , Ронер ) , throughout the world, is quite a common cognomen. The cognomen Rohner is characteristic of Western Europe, particularly Switzerland, where it is quite a common surname, Liechtenstein, and Austria, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Switzerland, Germany, and the United States. Much less frequently, Rohner is the forename as well as the last name.