Last name เตธวัช (Tethawat 
, เตธวัช , Taethawat ) , in the world, is a very rare cognomen. The cognomen เตธวัช is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เตธวัช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tethawat, Taethawat, เตธวัช | Thailand |