Surname โรจน์ฤทธิกุล (โรจน์ฤทธิกุล 
) , in the world, is an extremely rare last name. The cognomen โรจน์ฤทธิกุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| โรจน์ฤทธิกุล | Thailand |