Surname Krishnakumar (Krishnakumar 
, กฤษณะกุมาร 
) , around the world, is quite a common cognomen. The cognomen Krishnakumar is habitual in United Arab Emirates, where it is quite a rare surname, Sri Lanka, and Bahrain. Not in comparison with a country's population, it is commonest in India, Sri Lanka, and United Arab Emirates. More prevalently, Krishnakumar is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Krishnakumar | Saudi Arabia, Sri Lanka, Malaysia, United Arab Emirates, India |
| กฤษณะกุมาร | Thailand |
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c. p. krishnakumar Indian academic, writer, poet, scholar (b. 1939) |
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v. p. krishnakumar Indian sound engineer, editor and recorder, IN (b. 1958) |
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sivaangi krishnakumar Indian singer and actress) |
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| k. p. krishnakumar Indian artist (1958-1989), IN (b. 1958) |
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| jaya krishnakumar economist (b. 1958) |
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| jayalakshhmi krishnakumar (b. 1958) |
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| pudiyangum krishnakumar Indian cricketer, IN (b. 1974) |
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| krishnakumar nair researcher |
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| krishnakumar subramaniam researcher (ORCID 0000-0002-1958-5999) |
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| nagamani krishnakumar Ph.D. University of California, Santa Barbara 1993 |
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| balu krishnakumar Researcher |
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| krishnakumar madhavan researcher |
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| sujatha krishnakumar researcher |
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| anirudh krishnakumar researcher |
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| krishnakumar sharanya researcher (ORCID 0000-0002-4061-7342) |
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Sah, Pillai, Thakur, Tiwari, Kayarat, Krishna, Tripura, Debbarma, Manoharan, Rajendran, Narayanan, Natarajan, Nadarajah, Srinivasan, Krishnavihar, Subramanian, Rajagopalan, Gangadharan, Balakrishnan, Ramachandran, Pandey, Thiruthippillilrajan, Shukla, Sarkar, Sau, Ray, Rai, Das, Jha, Sing, Nair, Iyer, Menon, Singh, Kumar, Patel, Dubey, Gupta, Ghosh, Yadav, Mandal, Mondal, Mishra, Sharma, and Balasubramanian