Worldwide, Jun Kai (Jun Kai 
) is a rare boy's first name. The forename Jun Kai is habitual in Taiwan, where it is a rare male name, Singapore, and Malaysia. Much less frequently, Jun Kai is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Jun Kai | China, Taiwan, Japan, Singapore, Malaysia |
Lo, Chan, Chai, Chin, Chen, Choo, Chua, Kong, Khoo, Leow, Liew, Liao, Teoh, Hong, Wang, Wong, Quek, Quah, Xiao, Chong, Kwong, Leong, Wee, Ooi, Ong, Fam, Ng, Hu, Oh, Mok, San, Sim, Ang, Beh, Kai, Koh, Foong, Gan, Lai, Lee, Lim, Lok, Loo, Low, Loh, Tan, Tng, Neo, Guo, and Yoong