Last name Phiriyakun (Phiriyakun 
) , in all the world, is an extremely rare family name. The cognomen Phiriyakun is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, Phiriyakun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phiriyakun | Thailand |