Family name Nittayawimon (Nittayawimon 
) , in all the world, is a very rare last name. The surname Nittayawimon is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Nittayawimon | Thailand |
Chaiwat, Thaweewan, and Phattarawadee