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Cognomen Byeon (Byeon
, 변
, Пён
) , in all the world, is a common last name. The cognomen Byeon is habitual in South Korea, where it is quite a common surname, Australia, where it is a very rare surname, and Poland. In absolute terms, the name is most common in South Korea, the United States, and Japan. Much less frequently, Byeon is the forename as well as the last name.