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Worldwide, Hayun (Hayun , 하윤 , חיון ) is quite a rare gender-neutral first name. The given name Hayun is characteristic of South Korea, where it is quite a rare mostly female, but seldom masculine name, Indonesia, where it is a rare gender-neutral name, and India, where it is an extremely rare gender-neutral name. Also, Hayun is the last name as well as the forename.