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Surname Cosmo (Cosmo
, コスモ
) , in the entire world, is a common cognomen. The family name Cosmo is characteristic of Djibouti, where it is quite a common surname, Brazil, where it is quite a rare surname, and Italy. Measured by absolute frequency, it most frequently occurs in Brazil, Italy, and Philippines. More frequently, Cosmo is the forename as well as the last name.