Cognomen Arnamwat (Arnamwat 
) , globally, is a very rare last name. The surname Arnamwat is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Arnamwat | Thailand |
| somrak arnamwat badminton player, TH (b. 1952) |
|