Surname บุญถิ่น (Merit 
, Boonthin 
, Bunthin 
) , throughout the world, is quite a rare cognomen. The surname บุญถิ่น is characteristic of Nigeria, where it is quite a rare surname, Ghana, where it is a rare surname, and Mexico. Measured by absolute frequency, it is the most numerous in Nigeria, Mexico, and France. Also, บุญถิ่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Merit | Zimbabwe, Mexico, France, Egypt, Nigeria |
| Boonthin | Thailand |
| Bunthin | United States, Canada, Thailand |