Cognomen Tamilselvan (Tamilselvan 
) , globally, is quite a rare last name. The surname Tamilselvan is characteristic of Singapore, where it is quite a rare surname, Malaysia, and United Arab Emirates, where it is a rare surname. In absolute terms, this name is the most popular in India, Malaysia, and United Arab Emirates. Likewise, Tamilselvan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tamilselvan | Saudi Arabia, Singapore, Malaysia, India, United Arab Emirates |
| k tamilselvan researcher (ORCID 0000-0001-5651-2310) |
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| tamilselvan, k. Indian politician, IN |
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| elakkiya tamilselvan researcher |
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| thozhar tamilselvan, p. Indian politician, IN |
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