Globally, Karthika (Karthika 
, கார்த்திகா) is quite a common mostly girly, but infrequently male forename. The given name Karthika is habitual in Western Asia, particularly United Arab Emirates, where it is quite a rare feminine name, Bahrain, and Oman. In absolute terms, it is the most numerous in India, United Arab Emirates, and Indonesia. Very seldom, Karthika is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Karthika | United Arab Emirates, India, Indonesia, Sri Lanka, Saudi Arabia |
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karthika thirunal lakshmi bayi Indian linguist (1916-2008), IN (b. 1916) |
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| karthika naïr French-Indian poet and dancer (b. 1972) |
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| karthika srinivas Indian film editor |
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| karthika kundil veetil researcher (ORCID 0000-0002-1529-4414) |
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| karthika govindan researcher |
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| karthika j kadassery researcher ORCID ID = 0000-0003-2065-1356 |
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| karthika suresh researcher |
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| karthika natarajan researcher ORCID ID = 0000-0001-7435-1477 |
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| karthika rajeeve researcher |
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| karthika ramakrishnan researcher |
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| karthika raghavan Ph.D. Dublin City University 2012 |
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| karthika arumugam researcher |
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| karthika sankar researcher |
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| karthika narendra researcher |
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| karthika muralidharan Indian actress, IN (b. 1997) |
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Raj, Ramesh, Easwar, Mohanan, Murugan, Prakash, Lakshmi, Vijayan, Selvaraj, Chandran, Pillai, Krishnan, Shanmugam, Rajendran, Natarajan, Nagarajan, Subramanian, Arunachalam, Balakrishnan, Krishnakumar, Ramachandran, Murugesan, Venkata Chellapathi, Prasad, Karthu, Das, Mani, Babu, Raja, Ravi, Devi, Nair, Mohan, Menon, Kannan, Sekar, Kumar, Priya, Rajan, Reddy, Gopal, Vijay, Sankar, Suresh, Karthi, Anand, and Radhakrishnan