Last name Vaithinathan (Vaithinathan 
) , in the world, is a rare cognomen. The last name Vaithinathan is habitual in Singapore, where it is a rare surname, Malaysia, where it is a very rare surname, and India, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in India, Malaysia, and the United States. Likewise, Vaithinathan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vaithinathan | Malaysia, Singapore, United States, India, Canada |
| rajasekaran vaithinathan Indian businessperson (born 1952, child of Shanmugam Vaithinathan), IN (b. 1952) |
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| vaithinathan selvaraju researcher |
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| vaithinathan karthikeyan researcher (ORCID 0000-0001-6734-8448) |
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