Across the world, ทวนเพชร (ทวนเพชร 
) is a very rare masculine forename. The forename ทวนเพชร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare male name. Likewise, ทวนเพชร is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| ทวนเพชร | Thailand |