Cognomen Napitak (Napitak 
) , in the entire world, is a very rare last name. The cognomen Napitak is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Napitak | Thailand |
Wattana, Potjangorn, Waraporn, and Vachiraya