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Last name Auerbach (Auerbach , Ауэрбах , אוירבך ) , across the world, is quite a common surname. The last name Auerbach is characteristic of Marshall Islands, where it is quite a common surname, Israel, and Germany, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in the United States, Germany, and Israel. Much less frequently, Auerbach is the forename as well as the last name.