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In all the world, Kosin (โกสินทร์ , Kosin , โกสินธ์ ) is quite a rare dominantly male, but uncommonly feminine forename. The first name Kosin is habitual in Thailand, where it is quite a rare predominantly boy's, but scarcely girly name, Laos, where it is quite a rare masculine name, and Uzbekistan, where it is a rare masculine name. In absolute terms, it most frequently occurs in Thailand, Nigeria, and Indonesia. Much less frequently, Kosin is the last name as well as the forename.