Cognomen Gunarajan (Gunarajan 
) , worldwide, is a very rare last name. The surname Gunarajan is characteristic of Malaysia, where it is a rare surname, Australia, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Malaysia, India, and Australia. Also, Gunarajan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gunarajan | Australia, Canada, India, Germany, Malaysia |