Cognomen Phirawong (พีรวงศ์ 
, Phirawong ) , all over the world, is a very rare surname. The surname Phirawong is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, Phirawong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พีรวงศ์, Phirawong | Thailand |