Cognomen Amaratunga (Amaratunga 
) , around the world, is quite a common surname. The cognomen Amaratunga is habitual in Sri Lanka, where it is quite a common surname, United Arab Emirates, where it is a rare surname, and Australia.
| VARIANT | COUNTRY |
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| Amaratunga | United Kingdom, Australia, United States, Sri Lanka, United Arab Emirates |
| j. e. amaratunga LK (b. 1940) |
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| dhammika jayanath amaratunga Ph.D. Princeton University 1984 (b. 1956) |
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| chanaka amaratunga Sri Lankan politician, LK (b. 1958) |
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| kanchana amaratunga researcher |
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| dilanthi amaratunga researcher ORCID ID = 0000-0002-1682-5301 |
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| j. a. amaratunga member of Sri Lanka Senate |
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| nimal gamini amaratunga Sri Lankan judge |
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| chanaki amaratunga infectious disease researcher |
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Mr, Ralph, Rehan, Rishi, Ruwan, Dinuk, Dilan, Gehan, Givan, Gihan, Keith, Jehan, Navin, Nigel, Hemal, Oscar, Milton, Mihiri, Sanath, Shahen, Shamal, Tissa, Shehan, Kasun, Asoka, Sam, Ann, Anu, Mark, Miie, Anil, Kuda, Ravi, Ryan, Akila, John, Mohan, Milan, Shane, Sunil, Sujan, Aloma, Anura, Anoja, Ashan, June, and Sumith