Cognomen เบญจพงศ์ (Benjapong 
, เบญจพงศ์ , Benjaphong ) , throughout the world, is a rare last name. The cognomen เบญจพงศ์ is habitual in Thailand, where it is a rare surname, and China, where it is an extremely rare surname. Very seldom, เบญจพงศ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Benjapong | China, Thailand |
| เบญจพงศ์, Benjaphong, Benchapong | Thailand |