Cognomen ฤทธิ์เดชากุล (ฤทธิ์เดชากุล 
) , around the globe, is a very rare family name. The family name ฤทธิ์เดชากุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์เดชากุล | Thailand |