Cognomen ถวัล (Thawan 
, ถวัล ) , throughout the world, is a rare last name. The cognomen ถวัล is habitual in Kuwait, where it is quite a rare surname, Thailand, where it is a rare surname, and Malaysia, where it is a very rare surname. More frequently, ถวัล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thawan | Myanmar, Kuwait, Thailand, Brazil, Malaysia |
| ถวัล | Thailand |