Cognomen Nallaiyan (Nallaiyan 
) , globally, is a rare last name. The surname Nallaiyan is characteristic of Malaysia, where it is a very rare surname, India, where it is an extremely rare surname, and the United Kingdom. In absolute terms, the name is most common in India, Malaysia, and the United States. Also, Nallaiyan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nallaiyan | Malaysia, United States, United Kingdom, India |