Family name Plengsang (Plengsang 
) , in all the world, is a very rare surname. The surname Plengsang is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Plengsang is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Plengsang | Thailand |
Sariya, Sunisa, and Phongdanai