Surname Watthanawut (Watthanawut 
) , all around the world, is an extremely rare last name. The family name Watthanawut is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, Watthanawut is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Watthanawut | Thailand |
Ammawat, and Pitthayawatthana