Family name Pratchayasitkul (Pratchayasitkul 
) , in all the world, is a very rare last name. The cognomen Pratchayasitkul is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pratchayasitkul | Thailand |
Payom, Pimpannarai, Pitakphong, and Pakkarapong