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Surname Kleiner (Kleiner , קליינר , Клейнер ) , around the world, is a common cognomen. The family name Kleiner is characteristic of Israel, where it is quite a common surname, Switzerland, and Germany, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Israel. Much less frequently, Kleiner is the forename as well as the last name.