Last name พงษ์ไทย (พงษ์ไทย 
, Pongthai 
, Phongthai 
) , in the entire world, is quite a rare family name. The cognomen พงษ์ไทย is habitual in Thailand, where it is quite a rare surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, พงษ์ไทย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พงษ์ไทย | Thailand |
| Pongthai | United States, Thailand, India |
| Phongthai | Australia, United States, Thailand, India |