All over the world, Rajasekaran (Rajasekaran 
, ராஜசேகரன்) is quite a rare male first name. The first name Rajasekaran is characteristic of Singapore, where it is quite a rare dominantly male, but seldom girly name, United Arab Emirates, where it is a rare masculine name, and Qatar. Measured by absolute frequency, the name is most common in India, Singapore, and Sri Lanka. Likewise, Rajasekaran is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Rajasekaran | Sri Lanka, United States, Malaysia, Singapore, India |
| arjunan rajasekaran Indian urologist and surgeon, IN (b. 1935) |
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| rajasekaran pichaya Indian sprinter, IN (b. 1941) |
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| rajasekaran vaithinathan Indian businessperson (born 1952, child of Shanmugam Vaithinathan), IN (b. 1952) |
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| shivagnanam rajasekaran Indian businessperson (born 1974, child of Subbaryar Vinayaga Mudaliyar Shivagnanom), IN (b. 1974) |
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| rajasekaran ganeshkumar researcher |
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| mahadevan raj rajasekaran researcher (ORCID 0000-0003-4188-1628) |
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| govindasamy rajasekaran Malaysian trade unionist, MY |
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| rajasekaran subbiah researcher ORCID ID = 0000-0003-2303-3246 |
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| rajkumar rajasekaran researcher |
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| rajasekaran raghu researcher |
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| mahadevan raj rajasekaran researcher (ORCID 0000-0002-0045-6396) |
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| baskaran rajasekaran researcher |
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| valli rajasekaran researcher (ORCID 0000-0003-4167-1188) |
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| rajasekaran koteeswaran researcher |
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| ganesan rajasekaran researcher (ORCID 0000-0002-7579-7654) |
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