Surname นิลวรรณ์ (นิลวรรณ์ 
) , across the world, is a rare last name. The family name นิลวรรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Also, นิลวรรณ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| นิลวรรณ์ | Thailand |