Surname Rengwang (Rengwang 
, เริงวัง 
) , globally, is a very rare family name. The cognomen Rengwang is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, Rengwang is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rengwang | India, China |
| เริงวัง | Thailand |