Throughout the world, Rajarathnam (Rajarathnam 
) is a rare largely masculine, but uncommonly feminine first name. The given name Rajarathnam is characteristic of Southern Asia, particularly India, where it is a very rare dominantly boy's, but uncommonly girly name. Also, Rajarathnam is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rajarathnam | Singapore, Malaysia, India, Sri Lanka, South Africa |
| allu rajarathnam Indian theologian, IN (b. 1941) |
|
|
| kumar rajarathnam Indian Judge (1942-2015) (b. 1942) |
|
|
| dharmarajan rajarathnam researcher, ORCID id # 0000-0001-6863-5510 |
|