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Last name 莱顿 (Layton , Leton , Leyden ) , in the entire world, is a common family name. The cognomen 莱顿 is habitual in Ireland, where it is quite a rare surname, Australia, and Oman. In absolute terms, it is the most numerous in the United States, the United Kingdom, and Australia. Very seldom, 莱顿 is the forename as well as the last name.