Cognomen Piriyatham (Piriyatham 
) , all over the world, is a very rare last name. The family name Piriyatham is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, Piriyatham is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Piriyatham | Thailand |