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Surname Loutan (Loutan , Лутан ) , throughout the world, is a rare last name. The cognomen Loutan is characteristic of Trinidad and Tobago, where it is quite a rare surname, Switzerland, and South Africa, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Trinidad and Tobago, Switzerland, and the United States. Much less frequently, Loutan is the forename as well as the last name.