Family name ฤทธิ์นาน (ฤทธิ์นาน 
) , around the world, is an extremely rare cognomen. The family name ฤทธิ์นาน is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์นาน | Thailand |