Cognomen Phosuwattanakul (Phosuwattanakul 
) , globally, is an extremely rare family name. The cognomen Phosuwattanakul is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phosuwattanakul | Thailand |
Rujjikorn, Ajcharat, Nawaphol, and Natthaphol