Surname บุญไทย (บุญไทย 
, Boonthai 
, Bunthai 
) , all around the world, is quite a rare last name. The surname บุญไทย is habitual in Thailand, where it is quite a rare surname, Cambodia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Thailand, China, and the United States. Also, บุญไทย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| บุญไทย | Thailand |
| Boonthai | Thailand, United States, Malaysia, China |
| Bunthai | Thailand, France, United States, Cambodia, China |