Cognomen Rangachari (Rangachari 
) , all around the world, is quite a rare surname. The cognomen Rangachari is characteristic of Singapore, where it is a rare surname, India, where it is a very rare surname, and Canada. In absolute terms, it is the most numerous in India, the United States, and Singapore. Also, Rangachari is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rangachari | Canada, United Kingdom, United States, Singapore, India |
| t. rangachari Indian politician, IN (b. 1865) |
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| s. rangachari indian surgeon, IN (b. 1882) |
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| m. s. rangachari (b. 1936) |
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| tirumalai cunnavakum anandan pillai rangachari Indian diplomat, IN (b. 1947) |
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| deepa rangachari researcher |
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| anand rangachari Ph.D. University of Florida 1992 |
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| malliyam satakopacharya rangachari Ph.D. University of Madras 1966 |
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| kaveri rangachari researcher |
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| manu rangachari researcher and university professor, CA |
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| lakshmi rangachari Ph.D. Iowa State University 1982 |
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| vivek rangachari |
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