Last name コスモ (Cosmo 
, コスモ 
) , in the world, is a common family name. The last name コスモ is habitual in Djibouti, where it is quite a common surname, Brazil, where it is quite a rare surname, and Italy. Measured by absolute frequency, it is the most numerous in Brazil, Italy, and Philippines. More prevalently, コスモ is the forename as well as the last name.