Surname Senthilrajan (Senthilrajan 
) , across the world, is a very rare family name. The surname Senthilrajan is habitual in Australia, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Canada. Not in comparison with a country's population, it most frequently occurs in India, Australia, and Malaysia. Likewise, Senthilrajan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Senthilrajan | Australia, Canada, India, Malaysia, United States |