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Last name Plejer (Plejer , Плейер , بلاير) , across the world, is a very rare cognomen. The last name Plejer is characteristic of Serbia, where it is a rare surname, Hungary, and Russia, where it is an extremely rare surname. In absolute terms, it is the most numerous in Serbia, Hungary, and the United States. Much less frequently, Plejer is the forename as well as the last name.