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In the entire world, Kostr (Kost , Kostur , Cost ) is a rare unisex given name. The first name Kostr is habitual in Greece, where it is a rare boy's name, Israel, and Indonesia, where it is a very rare unisex name. Not in comparison with a country's population, it is commonest in Indonesia, Greece, and India. More frequently, Kostr is the last name as well as the forename.
Kostr is also a name for the fictitious and mythical characters: .