Family name Karunaratne (Karunaratne 
) , in all the world, is a common cognomen. The family name Karunaratne is habitual in Sri Lanka, where it is a common surname, Maldives, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it most frequently occurs in Sri Lanka, Australia, and the United States. Much less frequently, Karunaratne is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Karunaratne | United Arab Emirates, Sri Lanka, Australia, United States, Bangladesh |
Карунаратне, and กรรณรัตน์
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w. s. karunaratne Sri Lankan politician, LK (b. 1928) |
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h. d. karunaratne LK (b. 1964) |
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| v. t. g. karunaratne (b. 1917) |
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| sam karunaratne Sri Lankan computer scientist, LK (b. 1937) |
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| hatha karunaratne Sri Lankan boxer, LK (b. 1941) |
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| hema nalin karunaratne Sri Lankan journalist and television presenter (1962-2018), LK (b. 1962) |
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| m. d. namal karunaratne Sri Lankan politician, LK (b. 1968) |
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| niluka karunaratne Sri Lankan cricketer, LK (b. 1979) |
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| karunaratne amarasinghe Sri Lankan state media personnel |
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| s h p parakrama karunaratne researcher (ORCID 0000-0002-2537-0548) |
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| veranja karunaratne researcher |
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| ruvith karunaratne cricketer, LK |
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| mihiri karunaratne researcher |
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| kumudu karunaratne researcher |
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| anjani m karunaratne researcher |
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