Surname Khumsai (Khumsai 
) , in the world, is a very rare last name. The cognomen Khumsai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, Khumsai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khumsai | India, Thailand |