Family name Plongsuwan (Plongsuwan 
) , in all the world, is a very rare cognomen. The cognomen Plongsuwan is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Plongsuwan | Thailand |
Kawee, Piyawan, Natnaree, Jaturaporn, and Natpaphat