Cognomen Piyoung (Piyoung 
) , across the world, is a very rare family name. The last name Piyoung is characteristic of Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. Much less frequently, Piyoung is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Piyoung | China, United States, Thailand |