Surname Pilairat (Pilairat 
) , all over the world, is an extremely rare family name. Much more frequently, Pilairat is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pilairat | United States, Thailand |
Arnold, Yordya, Kijviriyapakorn, Nerawong, Prompang, Pimpawat, Phetsichuang, Tongurai, Chatachar, Klongklaw, Duangkaew, Thammakit, Thienthad, Wangsrirang, Chamroenlert, and Chinsakulcharoen