Family name Sundarraj (Sundarraj 
) , all around the world, is quite a rare last name. The cognomen Sundarraj is habitual in Sri Lanka, where it is quite a rare surname, United Arab Emirates, and Oman, where it is a rare surname. In absolute terms, the name is most common in India, Sri Lanka, and United Arab Emirates. Also, Sundarraj is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sundarraj | Saudi Arabia, India, United Arab Emirates, United States, Sri Lanka |
| n. sundarraj Indian politician (1944-1994), IN (b. 1944) |
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| r. sundarraj Producer of second malayalam Film, IN |
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| kiruthika sundarraj researcher ORCID ID = 0000-0003-4068-4534 |
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