Last name Rajalingam (Rajalingam 
) , all around the world, is quite a common family name. The last name Rajalingam is characteristic of Malaysia, where it is quite a rare surname, Sri Lanka, and Kuwait. Not in comparison with a country's population, it most frequently occurs in India, Malaysia, and Sri Lanka. Also, Rajalingam is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rajalingam | Indonesia, Sri Lanka, Malaysia, India, Kuwait |
| k. rajalingam politician (b. 1909) |
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| raja rajalingam researcher |
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| dhaksshaginy rajalingam researcher |
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| viswa retnasingam rajalingam researcher |
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| preman rajalingam researcher |
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| krishnaraj rajalingam researcher |
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