Surname ฤทธิ์โรจน์ (ฤทธิ์โรจน์ 
) , all over the world, is a very rare cognomen. The family name ฤทธิ์โรจน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ฤทธิ์โรจน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์โรจน์ | Thailand |