Cognomen สุวัธน์ (Suwat 
, สุวัธน์ ) , around the globe, is a rare surname. The family name สุวัธน์ is habitual in Thailand, where it is a rare surname, Saudi Arabia, where it is a very rare surname, and Malaysia. Not in comparison with a country's population, it is commonest in Thailand, Indonesia, and Saudi Arabia. Predominantly, สุวัธน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Suwat | Saudi Arabia, China, United States, Thailand, Indonesia |
| สุวัธน์ | Thailand |