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Cognomen Ledan (Dent , 乐丹 , Ledan ) , around the world, is a common family name. The cognomen Ledan is characteristic of Isle of Man, where it is quite a common surname, the United Kingdom, and Australia, where it is quite a rare surname. In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Australia. Very seldom, Ledan is the forename as well as the last name.