Family name Hettiarachchi (Hettiarachchi 
) , throughout the world, is a common surname. The last name Hettiarachchi is characteristic of Sri Lanka, where it is a common surname, Maldives, where it is quite a common surname, and United Arab Emirates, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Sri Lanka, United Arab Emirates, and Australia.
| VARIANT | COUNTRY |
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| Hettiarachchi | Australia, United Arab Emirates, Indonesia, Saudi Arabia, Sri Lanka |
| d. f. hettiarachchi Ceylonese politician (1919–1970) (b. 1919) |
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| sunil hettiarachchi Sri Lankan actor (1937-2015), LK (b. 1937) |
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| samanthi hettiarachchi badminton player, LK (b. 1953) |
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| radhika hettiarachchi Sri Lankan rugby union player (b. 1977) |
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| hiroshan hettiarachchi researcher (ORCID 0000-0001-5675-167X) |
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| jeewanadee hettiarachchi researcher (ORCID 0000-0003-0995-9042) |
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| nishani tania hettiarachchi researcher |
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| chamath hettiarachchi Ph.D. University of Toledo 2005 |
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| mathula hettiarachchi researcher |
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| charith aravinda hettiarachchi researcher |
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| missaka hettiarachchi researcher |
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| lushan v hettiarachchi researcher |
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| sachithra amarin hettiarachchi researcher ORCID ID = 0000-0002-3456-6075 |
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| dinul hettiarachchi researcher |
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| suraj u hettiarachchi researcher |
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