Around the world, นิลวรรรณ (นิลวรรรณ 
) is a very rare largely female, but infrequently masculine given name. The given name นิลวรรรณ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare gender-neutral name.
| VARIANT | COUNTRY |
|---|---|
| นิลวรรรณ | Thailand |