Cognomen Santhanam (Santhanam 
) , in all the world, is quite a common family name. The last name Santhanam is characteristic of United Arab Emirates, where it is quite a rare surname, Malaysia, and Qatar. Measured by absolute frequency, the name is most common in India, Malaysia, and the United States. Very seldom, Santhanam is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Santhanam | United Arab Emirates, Malaysia, India, United States, Sri Lanka |
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santhanam arulsamy Sri Lankan politician (1959-2019) (b. 1959) |
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| t. s. santhanam (b. 1912) |
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| maharajapuram santhanam carnatic vocalist from Tamilnadu, India, IN (b. 1928) |
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| k. s. v. santhanam Indian-born American physical chemist, IN (b. 1938) |
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| parthasarathy santhanam researcher, IN (b. 1979) |
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| santhanam sundar researcher ORCID ID = 0000-0003-0850-5161 |
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| t. santhanam Indian film art director (c. 1970 – 2022) |
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| l. santhanam politician, IN |
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| harini santhanam researcher (ORCID 0000-0003-3464-8027) |
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| srikanth k santhanam researcher |
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| t. s. santhanam Ph.D. University of Madras 1970 |
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| veera santhanam Indian painter, activist, and actor |
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| keshav santhanam researcher ORCID ID = 0000-0001-5939-7944 |
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| santhanam vidyalakshmi researcher |
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| santhanam shanmughapriya researcher |
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