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Surname Luben (Любен , Luben ) , across the world, is quite a rare last name. The cognomen Luben is habitual in Bulgaria, where it is quite a common surname, Papua New Guinea, where it is quite a rare surname, and the Dominican Republic, where it is a rare surname. In absolute terms, this name is the most popular in Bulgaria, Nigeria, and the United States. Also, Luben is the forename as well as the last name.