Globally, Karthick (Karthick 
) is quite a rare masculine given name. The forename Karthick is habitual in Western Asia, particularly United Arab Emirates, where it is quite a rare male name, Qatar, and Oman. Not in comparison with a country's population, it is commonest in India, United Arab Emirates, and Saudi Arabia. Very seldom, Karthick is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Karthick | Saudi Arabia, India, United Arab Emirates, United States, Sri Lanka |
| karthick murugappan researcher |
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| karthick navin researcher |
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| karthick thiyagarajan researcher ORCID ID = 0000-0002-4044-1711 |
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| karthick subramani researcher (ORCID 0000-0002-7751-7759) |
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| perumal karthick researcher |
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| karthick babu sai sankar gupta researcher |
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| karthick vishwanathan researcher |
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| karthick chandraseker Ph.D. Cornell University 2008 |
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| karthick ramakrishnan American political scientist |
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| karthick jayaraman Ph.D. Syracuse University 2011 |
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| rajendran karthick researcher (ORCID 0000-0003-3938-3347) |
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| karthick rangasamy researcher |
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| karthick subramani researcher ORCID 0000-0001-9182-159X |
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| balasubramanian karthick botanist (b. 1981) |
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