Family name Paiyarath (Paiyarath 
) , around the world, is a very rare cognomen. The surname Paiyarath is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Paiyarath | Thailand |
Krisana, Pongsith, Narueporn, and Sudsanguan