Family name Nethnapa (Nethnapa 
) , in all the world, is an extremely rare last name. Much more frequently, Nethnapa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nethnapa | United States, Thailand |
Utama, Tummee, Vongskan, Srikhamtan, Thammasiri, and Outhaithany