Cognomen Prayunsak (Prayunsak 
) , across the world, is an extremely rare surname. The surname Prayunsak is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, Prayunsak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Prayunsak | Thailand |