Family name Chienpairoj (Chienpairoj 
) , around the world, is a very rare cognomen. The surname Chienpairoj is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Chienpairoj | Thailand |
Dentham, Ritthiron, Thammajak, and Pruettipong