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Surname Хаийун (Haijun , Хаийун , Khaiyun ) , around the world, is a rare family name. The surname Хаийун is characteristic of Singapore, where it is a rare surname, Switzerland, and Malaysia, where it is a very rare surname. In absolute terms, this name is the most popular in China, Indonesia, and Spain. Much more frequently, Хаийун is the forename as well as the last name.