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Family name Esper (Esper , Эспер , Еспер ) , in the entire world, is quite a common cognomen. The cognomen Esper is characteristic of Lebanon, where it is quite a common surname, Syria, where it is quite a rare surname, and Argentina. In absolute terms, it most frequently occurs in Syria, Brazil, and the United States. Much less frequently, Esper is the forename as well as the last name.