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Last name Frohlich (Frohlich , Fröhlich ) , throughout the world, is a common surname. The cognomen Frohlich is characteristic of Western Europe, particularly Germany, where it is quite a common surname, Switzerland, and Austria (explore the name in all countries). Not in comparison with a country's population, it is commonest in Germany, Brazil, and Switzerland. Much less frequently, Frohlich is the forename as well as the last name.