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Surname Gayun (Gayun
, 가윤
, Гаюн
) , in the world, is a rare cognomen. The surname Gayun is characteristic of Malaysia, where it is quite a rare surname, Ukraine, where it is a rare surname, and Belarus. Measured by absolute frequency, it is commonest in Malaysia, Ukraine, and Russia. Much less frequently, Gayun is the forename as well as the last name.