Cognomen Kaolai (Kaolai 
) , in the entire world, is a very rare last name. The family name Kaolai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, Kaolai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kaolai | India, China, United States, Thailand |