Cognomen Nithyan (Nithyan 
) , worldwide, is a very rare last name. The surname Nithyan is characteristic of Malaysia, where it is a very rare surname, Honduras, and India, where it is an extremely rare surname. More frequently, Nithyan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nithyan | Honduras, Brazil, Malaysia, India, South Africa |