Cognomen Kyain (Kyain 
) , globally, is a rare last name. The surname Kyain is habitual in Myanmar, where it is quite a rare surname, Nigeria, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Myanmar, Nigeria, and China. Also, Kyain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kyain | China, Malaysia, Nigeria, United States, Myanmar |