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