Cognomen ฤทธิ์ฤาไชย (ฤทธิ์ฤาไชย 
) , all around the world, is an extremely rare last name. The surname ฤทธิ์ฤาไชย is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์ฤาไชย | Thailand |