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