Last name ไพโรจน์พาณิชย์ (ไพโรจน์พาณิชย์ 
) , all around the world, is an extremely rare family name. The last name ไพโรจน์พาณิชย์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ไพโรจน์พาณิชย์ | Thailand |