Family name Pechnui (Pechnui 
) , across the world, is a very rare surname. The family name Pechnui is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pechnui | Thailand |
Kuy, Pitugpong, Tananan, Athittaya, and Pitukphong