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