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