Surname Piriyapitayar (Piriyapitayar 
) , across the world, is a very rare family name. The cognomen Piriyapitayar is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Piriyapitayar | Thailand |
Kobkan, Kobkarn, and Chiewcharn