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Cognomen Lemin (乐民 , 乐敏 , Lemin ) , around the world, is quite a rare family name. The cognomen Lemin is characteristic of Mauritania, where it is quite a common surname, New Zealand, where it is a rare surname, and Australia. In absolute terms, it is commonest in China, Mauritania, and the United States. More frequently, Lemin is the forename as well as the last name.