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