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Last name Реувен (Reuven , Reouven , Реувен ) , in the world, is a rare cognomen. The family name Реувен is habitual in Israel, where it is quite a rare surname, Panama, where it is a rare surname, and Hungary. Measured by absolute frequency, it most frequently occurs in Israel, the United States, and Hungary. More frequently, Реувен is the forename as well as the last name.