Family name Kathirasan (Kathirasan 
) , all over the world, is a rare surname. The surname Kathirasan is habitual in Malaysia, where it is a rare surname, Singapore, where it is a very rare surname, and India, where it is an extremely rare surname. Very seldom, Kathirasan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kathirasan | India, Malaysia, Singapore |