Last name Goonatilake (Goonatilake 
) , all around the world, is a rare surname. The last name Goonatilake is habitual in Sri Lanka, where it is quite a rare surname, the United Kingdom, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Goonatilake | United States, Sri Lanka, United Kingdom |
| harry goonatilake Sri Lankan aviator (1929-2008), LK (b. 1929) |
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| h. a. rohitha ananda goonatilake Ph.D. Kent State University 1997 |
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| susantha goonatilake Sri Lankan academic, sociologist, and Professor |
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| shirantha goonatilake Sri Lanakan Air Force officer, LK |
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| rohitha goonatilake researcher ORCID ID = 0000-0001-5433-3941 |
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