Cognomen Pirarot (พิรโรจน์ 
, Pirarot ) , throughout the world, is a very rare surname. The surname Pirarot is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, Pirarot is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pirarot, พิรโรจน์ | Thailand |