Cognomen Nilthakal (Nilthakal 
) , globally, is a very rare surname. The last name Nilthakal is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Nilthakal is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nilthakal | Thailand |
Vilin, Vichian, and Pattanalin