Cognomen ระพงษ์ (ระพงษ์ 
) , in all the world, is an extremely rare family name. The cognomen ระพงษ์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, ระพงษ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ระพงษ์ | Thailand |