Last name Soundararaj (Soundararaj 
) , globally, is a rare surname. The last name Soundararaj is habitual in Sri Lanka, where it is quite a rare surname, India, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Sri Lanka, India, and the United States. Much less frequently, Soundararaj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Soundararaj | France, United Kingdom, United States, India, Sri Lanka |