Cognomen Vaidyanathan (Vaidyanathan 
) , in the world, is quite a common surname. The cognomen Vaidyanathan is characteristic of Bahrain, where it is quite a rare surname, United Arab Emirates, and Singapore. In absolute terms, this name is the most popular in India, the United States, and United Arab Emirates. Likewise, Vaidyanathan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Vaidyanathan | Kenya, United Arab Emirates, Singapore, United States, India |
Ваидянатхан, and Вайдьянатхан
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l. v. vaidyanathan soil scientist (1928-2000), IN (b. 1928) |
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kunnakudi vaidyanathan Indian violinist (1935-2008), IN (b. 1935) |
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sunil vaidyanathan Indian writer (b. 1976) |
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vinodhini vaidyanathan Indian actress, IN (b. 1978) |
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arun vaidyanathan Indian American film director, US |
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| k. r. vaidyanathan (b. 1926) |
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| vasantha vaidyanathan Indian writer, IN (b. 1937) |
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| l. vaidyanathan Indian composer, IN (b. 1942) |
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| palghat vaidyanathan Indian-born American electrical engineer and researcher, IN (b. 1954) |
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| ananth vaidyanathan Indian voice expert, IN (b. 1957) |
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| vaidyanathan ravikumar chess player (b. 1959) |
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| lalgudi saptharishi vaidyanathan Indian businessperson (born 1961, child of Lalgudi Arunachalam Saptharishi), IN (b. 1961) |
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| sethu vaidyanathan Indian businessperson (born 1967, child of Vaidyanathan Venkateswara Iyer), IN (b. 1967) |
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| v. vaidyanathan Indian Businessman, IN (b. 1968) |
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| tiruvarur vaidyanathan (b. 1963) |
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