Surname Plaiwan (Plaiwan 
) , globally, is a very rare family name. The last name Plaiwan is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Plaiwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Plaiwan | Thailand |
Sutat, Tanayuth, and Wichudaporn