Surname Kuwatjanakul (Kuwatjanakul 
) , in the entire world, is a very rare family name. The surname Kuwatjanakul is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kuwatjanakul | Thailand |
Sitanan, Pattaraporn, and Pitchayanan