Family name ฤทธิ์ภักดีกุล (ฤทธิ์ภักดีกุล 
) , in all the world, is a very rare last name. The cognomen ฤทธิ์ภักดีกุล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์ภักดีกุล | Thailand |