Last name รัตนพงศ์หิรัญ (รัตนพงศ์หิรัญ 
) , throughout the world, is an extremely rare family name. The cognomen รัตนพงศ์หิรัญ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตนพงศ์หิรัญ | Thailand |