Last name นิลราช (Nilraj 
, นิลราช 
) , in the entire world, is a very rare family name. The cognomen นิลราช is characteristic of Thailand, where it is a very rare surname, and South Africa, where it is an extremely rare surname. More prevalently, นิลราช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nilraj | United States, Canada, India, South Africa |
| นิลราช | Thailand |