Family name Theewasit (Theewasit 
) , all over the world, is an extremely rare cognomen. Predominantly, Theewasit is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Theewasit | Thailand |
Arthiprom, Pakdeedida, Pakdeedindan, Poomseetong, Khattiyasurin, and Vongsangchoom