Family name Samaranayake (Samaranayake 
) , all over the world, is a common last name. The last name Samaranayake is habitual in Sri Lanka, where it is quite a common surname, United Arab Emirates, where it is a rare surname, and Qatar. Not in comparison with a country's population, the name is most common in Sri Lanka, Australia, and Indonesia.
| VARIANT | COUNTRY |
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| Samaranayake | Australia, United Arab Emirates, United States, Indonesia, Sri Lanka |
| l samaranayake researcher (b. 1900) |
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lakshman samaranayake Sri Lankan clinical academic (b. 1956) |
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| mark samaranayake Sri Lankan actor (1914–2000) (b. 1914) |
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| r. g. samaranayake Ceylonese planter and politician (1923-1992) (b. 1923) |
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| anusha samaranayake Sri Lankan cricketer, LK (b. 1962) |
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| geethamali samaranayake Ph.D. Purdue University 1993 |
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| govindi j samaranayake researcher |
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| chinthaka samaranayake researcher |
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| dulani lakmali samaranayake researcher (ORCID 0000-0003-3653-4023) |
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| n r samaranayake researcher |
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| haritha d samaranayake researcher |
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| anil samaranayake researcher |
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| v a samaranayake researcher ORCID id 0000-0002-1892-8363 |
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| u m j e samaranayake researcher (ORCID 0000-0001-9849-275X) |
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| kandanpita galaddalage lahiru ishan samaranayake researcher (ORCID 0000-0003-4944-3438) |
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