Family name Varatharajan (Varatharajan 
) , in the entire world, is quite a rare last name. The last name Varatharajan is habitual in Sri Lanka, where it is quite a rare surname, Qatar, and United Arab Emirates, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Sri Lanka, India, and Malaysia. Likewise, Varatharajan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Varatharajan | United Arab Emirates, India, Sri Lanka, Malaysia, Saudi Arabia |
| balachandar varatharajan Ph.D. University of California, San Diego 2001 |
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| r. varatharajan Indian entomologist, IN |
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| sharanya varatharajan researcher |
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| thepikaa varatharajan researcher (ORCID 0000-0001-9580-8894) |
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