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Cognomen Seres (Seres , 絲 ) , across the world, is a common family name. The family name Seres is characteristic of Eastern Europe, particularly Hungary, where it is quite a common surname, Romania, where it is quite a rare surname, and Slovakia. Measured by absolute frequency, it most frequently occurs in Hungary, China, and Romania. Much less frequently, Seres is the forename as well as the last name.