Cognomen บุญยา (Bunya 
, Merit 
, บุญยา ) , in all the world, is quite a common surname. The surname บุญยา is characteristic of Nigeria, where it is quite a rare surname, Hungary, where it is a rare surname, and Ghana. Measured by absolute frequency, it is commonest in Nigeria, Mexico, and Thailand. More prevalently, บุญยา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bunya | Nigeria, Thailand, Japan, France, United States |
| Merit | Egypt, Thailand, Nigeria, France, Mexico |
| บุญยา | Thailand |