Surname Kaluarachchi (Kaluarachchi 
) , around the globe, is a common cognomen. The family name Kaluarachchi is habitual in Sri Lanka, where it is quite a common surname, Qatar, where it is quite a rare surname, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Sri Lanka, United Arab Emirates, and Australia.
| VARIANT | COUNTRY |
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| Kaluarachchi | Australia, United States, Sri Lanka, United Arab Emirates, Qatar |
| chandra kaluarachchi Sri Lankan actress (1943-2019), LK (b. 1943) |
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| tharushi kaluarachchi researcher (ORCID 0000-0002-9576-1229) |
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| thilini dilhara jayasena kaluarachchi researcher (ORCID 0000-0002-1635-4917) |
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| dinushan c kaluarachchi researcher |
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Mr, Kasun, Kevin, Kusal, Ranya, Rehan, Rumal, Devin, Dasun, Gayan, Jason, Theja, Navin, Nalin, Nilan, Nuwan, Eshan, Viraj, Ishan, Isuri, Imali, Oshan, Bimal, Warna, Ajith, Asela, Don, Taz, Shan, Amal, Asha, Raja, Ravi, Ryan, Dona, Nero, Neel, Eraj, Mevan, Saman, Shadi, Supun, Sudam, Anupa, Anoja, Aruna, Amila, Ayomi, and Wikum