Cognomen Nagappan (Nagappan 
) , around the globe, is quite a common family name. The surname Nagappan is characteristic of Malaysia, where it is quite a common surname, Qatar, where it is quite a rare surname, and Singapore. Not in comparison with a country's population, it most frequently occurs in Malaysia, India, and Saudi Arabia. Also, Nagappan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Nagappan | Saudi Arabia, United Arab Emirates, Malaysia, United States, India |
| nagappan padayatchi South African martyr (b. 1891) |
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| c nagappan Indian judge, IN (b. 1951) |
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| beemkumar nagappan researcher ORCID ID = 0000-0003-3868-0382 |
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| kamaraj nagappan researcher |
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| nagappan rajendiran researcher |
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| arulkumar nagappan researcher ORCID ID = 0000-0003-3169-9064 |
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| thilahgavani nagappan researcher |
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| suresh nagappan researcher (ORCID 0000-0003-0290-7450) |
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| nagappan ramaswamy researcher (ORCID 0000-0002-3430-2758) |
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| mohanadas nagappan MY |
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| vijay nagappan Indian footballer, IN (b. 1995) |
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