Family name ไพโรจน์ฤทธิ์กุล (ไพโรจน์ฤทธิ์กุล 
) , globally, is a very rare last name. The cognomen ไพโรจน์ฤทธิ์กุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ไพโรจน์ฤทธิ์กุล | Thailand |