Family name ไพโรจน์พัฒนกุล (ไพโรจน์พัฒนกุล 
) , in the world, is a very rare last name. The last name ไพโรจน์พัฒนกุล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ไพโรจน์พัฒนกุล | Thailand |