Throughout the world, Ratnam (Ratnam 
) is a common unisex given name. The first name Ratnam is characteristic of Kuwait, where it is quite a rare gender-neutral name, India, and Qatar, where it is a rare boy's name. In absolute terms, it is the most numerous in India, Indonesia, and Sri Lanka. Likewise, Ratnam is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ratnam | United Arab Emirates, Australia, Malaysia, Sri Lanka, India |
|
kakani venkata ratnam Indian politician, IN (b. 1900) |
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| perala ratnam Indian diplomat, IN (b. 1911) |
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| kumaran ratnam (b. 1909) |
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| viswanathan ratnam Indian judge (b. 1932) |
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| king ratnam Sri Lankan actor and film director |
|
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| karunaharan ratnam Ph.D. Northeastern University 1999 |
|
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| sallangi ratnam Indian politician, IN |
|
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| madineni venkat ratnam IN (b. 1973) |
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| madura venkata ram kumar ratnam |
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