Family name Karthigasu (Karthigasu 
) , around the globe, is a rare surname. The family name Karthigasu is characteristic of Malaysia, where it is a rare surname, Singapore, and Australia, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Malaysia, Pakistan, and Singapore. Very seldom, Karthigasu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karthigasu | China, Malaysia, Pakistan, Singapore, Australia |