Across the world, Kayoon (Kayoon 
) is a very rare gender-neutral forename. The given name Kayoon is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare gender-neutral name. Much less frequently, Kayoon is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kayoon | South Korea, Malaysia, United States, Thailand, Myanmar |
Cho, Jittangkoon, Kitchareonrungroj, Chaichalor, Wongkamalasai, Rosenbaum, Kongcheay, Choothong, Promkorn, Petchkiew, Anderson, Thamnimitchok, Suttisut, Nuychim, Kangkul, Maothong, Raunngern, Sagjavanich, Tang, Jung, Park, Lee, Kim, Obdulraman, and Wanitchapiwong