Cognomen Karthesan (Karthesan 
) , throughout the world, is an extremely rare surname. The surname Karthesan is habitual in Australia and New Zealand, particularly New Zealand, where it is a very rare surname. Also, Karthesan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karthesan | India, New Zealand |
| v. karthesan Indian politician, IN |
|