Last name Ramanathan (Ramanathan 
, ராமநாதன்) , worldwide, is a common cognomen. The surname Ramanathan is characteristic of Malaysia, where it is quite a common surname, Sri Lanka, and Singapore (explore the name in all countries). Not in comparison with a country's population, it is commonest in India, Malaysia, and Sri Lanka. Likewise, Ramanathan is the forename as well as the last name.
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| Ramanathan | United Arab Emirates, United States, Malaysia, Sri Lanka, India |
| leelawathy ramanathan Australian writer (b. 1870) |
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ramanathan gnanadesikan Indian statistician, US (b. 1932) |
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veerabhadran ramanathan Indian scientist, IN (b. 1944) |
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| s. ramanathan Indian politician, IN (b. 1895) |
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| d. s. ramanathan Malaysian trade unionist, MY (b. 1908) |
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| tenkasi krishnaiyer ramanathan Inida, tennis player and coach, IN (b. 1910) |
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| k.r. ramanathan botanist (b. 1910) |
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ramu ramanathan Indian writer, IN (b. 1967) |
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| vaidyanatha iyer ramanathan (b. 1918) |
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erik ramanathan American diplomat, US |
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usha ramanathan Indian human rights activist, IN |
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| m. ramanathan Indian politician, IN (b. 1934) |
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| ramachandra ramanathan Indian economist (1936-2013), IN (b. 1936) |
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ramkumar ramanathan Indian tennis player, IN (b. 1994) |
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| n. ramanathan Professor of music, IN (b. 1946) |
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