Cognomen นิทร (Nit 
, นิทร ) , in all the world, is quite a rare family name. The surname นิทร is characteristic of Malaysia, where it is quite a rare surname, Mauritius, and Morocco. Not in comparison with a country's population, it is the most numerous in Malaysia, India, and Indonesia. Also, นิทร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nit | India, Laos, Thailand, Malaysia, Indonesia |
| นิทร | Thailand |