Cognomen Tubtai (Tubtai 
) , globally, is a very rare last name. The surname Tubtai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Tubtai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tubtai | Thailand |
Supap, Siripong, and Ratchaneekorn