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