Worldwide, โรจนฤทธิ์ (โรจนฤทธิ์ 
) is a very rare primarily male, but very seldom female first name. The forename โรจนฤทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare principally boy's, but very infrequently feminine name. Very seldom, โรจนฤทธิ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| โรจนฤทธิ์ | Thailand |