Worldwide, Ramanathan (Ramanathan 
, ராமநாதன்) is quite a rare masculine first name. The forename Ramanathan is characteristic of Singapore, where it is quite a rare dominantly male, but infrequently girly name, United Arab Emirates, where it is quite a rare male name, and Bahrain. Measured by absolute frequency, it is the most numerous in India, Sri Lanka, and Singapore. Likewise, Ramanathan is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Ramanathan | United Arab Emirates, United States, India, Sri Lanka, Malaysia |
| subramanian ramanathan IN (b. 1950) |
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| kumaresan ramanathan researcher |
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| subramaniam ramanathan researcher |
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| kollengode ramanathan researcher (ORCID 0000-0003-1822-9455) |
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| srinivasan ramanathan researcher |
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| chinnasamy ramaraj ramanathan researcher |
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| subramanian p ramanathan researcher, ORCID id # 0000-0002-2876-0322 |
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| parameswaran ramanathan Ph.D. University of Michigan 1989 |
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| muruganathan ramanathan researcher |
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| krishnan ramanathan Ph.D. Indian Institute of Technology, Bombay 2000 |
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| devakottai ramanathan Indian comedian, IN |
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| babu ramanathan researcher ORCID ID = 0000-0002-8216-3916 |
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| subramaniyan ramanathan researcher |
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| ramakrishnan ramanathan researcher |
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| murali ramanathan |
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