Family name Bounthai (Bounthai 
) , all over the world, is a rare surname. The surname Bounthai is habitual in Laos, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Bounthai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bounthai | Laos, United States |