Around the world, Rajika (Rajika 
) is quite a rare gender-neutral first name. The first name Rajika is habitual in Sri Lanka, where it is quite a rare gender-neutral name, India, where it is a rare unisex name, and Australia, where it is a very rare female name. In absolute terms, the name is most common in India, Sri Lanka, and the United States. Much less frequently, Rajika is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Rajika | Australia, United States, Singapore, India, Sri Lanka |
| rajika wickramasinghe Sri Lankan politician (b. 1973) |
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| rajika roy researcher (ORCID 0000-0001-9394-3224) |
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| rajika l perera researcher (ORCID 0000-0002-4932-8168) |
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| rajika kuruwita researcher |
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| rajika l dewasurendra researcher (ORCID 0000-0002-2041-6017) |
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| rajika gamage biologist |
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| rajika arora researcher ORCID ID = 0000-0001-9396-3671 |
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Ti, Wakde, Mandal, Mahali, Mittra, Sharma, Shaikh, Chopra, Bhasin, Kochar, Khatun, Perera, Peiris, Pillai, Tandon, Narain, Agarwal, Khatoon, Liyanage, Fernando, Munasinghe, Seneviratne, Tobey, Gupta, Begum, Begam, Roy, Shah, Seth, Sekh, Bano, Basu, Bibi, Khan, Puri, Reid, Nanayakkara, Reed, Jain, Nair, Ntar, Malik, Mahan, Mehra, Singh, Silva, Anand, Arora, Devi, and Goonewardene