Family name Rathanam (Rathanam 
) , around the globe, is quite a rare surname. The family name Rathanam is habitual in Malaysia, where it is a rare surname, Kuwait, and India. Measured by absolute frequency, it is the most numerous in India, Malaysia, and Saudi Arabia. Also, Rathanam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rathanam | Kuwait, Saudi Arabia, South Africa, Malaysia, India |