Around the world, Хаийун (Haijun 
, Хаийун 
, Khaiyun 
) is quite a rare gender-neutral forename. The first name Хаийун is characteristic of Taiwan, where it is quite a rare boy's name, Singapore, where it is a rare boy's name, and China, where it is a very rare boy's name. Measured by absolute frequency, it is the most numerous in China, India, and Taiwan. Very seldom, Хаийун is the last name as well as the forename.