Family name Smithnookulkit (Smithnookulkit 
) , across the world, is a very rare surname. The surname Smithnookulkit is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Smithnookulkit | Thailand |
Kanwarin, Lapassavee, Nattapatch, and Chetsaristh