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In the entire world, Cosmas (Cosmas , Козьма , Κοσμάς ) is a common principally male, but very seldom female first name. The forename Cosmas is characteristic of Sub-Saharan Africa, particularly Tanzania, where it is quite a common masculine name, Nigeria, where it is quite a rare dominantly male, but infrequently girly name, and Cameroon, where it is quite a rare boy's name. In absolute terms, it most frequently occurs in Tanzania, Nigeria, and Indonesia. Also, Cosmas is the last name as well as the forename.
Cosmas is also a name for the fictitious and mythical characters: Kozma Prutkov , the fictional Russian author.