Cognomen ฤทธิ์สุวรรณ์ (ฤทธิ์สุวรรณ์ 
) , throughout the world, is a very rare last name. The last name ฤทธิ์สุวรรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์สุวรรณ์ | Thailand |