Cognomen นิลวัลย์ (นิลวัลย์ 
) , all around the world, is a very rare family name. The family name นิลวัลย์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, นิลวัลย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| นิลวัลย์ | Thailand |