Last name บุญเจิง (บุญเจิง 
) , across the world, is a very rare cognomen. The cognomen บุญเจิง is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| บุญเจิง | Thailand |
Boon Cheng, and Boonjerng