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Surname Эйзен (Eizen , Eyzen , Эйзен ) , in the entire world, is a rare family name. The last name Эйзен is characteristic of Hungary, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Finland. Measured by absolute frequency, it most frequently occurs in Russia, Hungary, and the United States. More frequently, Эйзен is the forename as well as the last name.