Cognomen Mahalingam (Mahalingam 
) , all around the world, is a common last name. The surname Mahalingam is habitual in Sri Lanka, where it is quite a common surname, Malaysia, and United Arab Emirates, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Malaysia, India, and Sri Lanka. Also, Mahalingam is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mahalingam | United Arab Emirates, United States, India, Sri Lanka, Malaysia |
Махалингам, and Махалінгам
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t. r. mahalingam Tamil film actor, singer and music composer, IN (b. 1923) |
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t. r. mahalingam flautist (1926-1986), IN (b. 1926) |
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| n. mahalingam Indian businessman, IN (b. 1923) |
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| s. mahalingam Sri Lankan academic (1926-2015), LK (b. 1926) |
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| chandramouliswaran mahalingam Indian businessperson (born 1959, child of Chandramouliswaran), IN (b. 1959) |
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| indira mahalingam (b. 1952) |
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| suresh mahalingam researcher |
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| harshavardhan mahalingam researcher |
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| sajeni mahalingam researcher |
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| vijay venkatesh mahalingam Ph.D. University of Kentucky 2010 |
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| ravi mahalingam researcher |
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| mahalingam balasubramanian researcher |
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| dinesh mahalingam researcher |
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| s. mahalingam Sri Lankan academic and veterinarian, LK |
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| j.s. mahalingam Indian politician, IN |
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