Last name Rajamannar (Rajamannar 
) , in the world, is a rare surname. The family name Rajamannar is habitual in India, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Canada. Not in comparison with a country's population, it most frequently occurs in India, the United States, and the United Kingdom. More frequently, Rajamannar is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rajamannar | United Kingdom, Malaysia, United States, India, Canada |
| p. v. rajamannar Indian politician and judge, IN (b. 1901) |
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| s. x. rajamannar former Member of the Legislative Assembly, IN |
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| chittoor rajamannar Indian politician, IN |
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