Cognomen สุวรรณธน (สุวรรณธน 
, Suwanthon , Suwannatan 
) , all around the world, is a very rare last name. The cognomen สุวรรณธน is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สุวรรณธน, Suwanthon | Thailand |
| Suwannatan | United States, Thailand |