Family name Weerasekera (Weerasekera 
) , all around the world, is a common cognomen. The family name Weerasekera is characteristic of Sri Lanka, where it is quite a common surname, Australia, where it is a rare surname, and New Zealand. Measured by absolute frequency, it is commonest in Sri Lanka, Australia, and the United Kingdom.
| VARIANT | COUNTRY |
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| Weerasekera | Australia, Japan, United States, Sri Lanka, United Kingdom |
| j. d. weerasekera LK (b. 1917) |
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| dhanapala weerasekera LK (b. 1924) |
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| deepaka d weerasekera researcher |
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| danushka weerasekera researcher |
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| deepa weerasekera New Zealand-based statistician |
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| a weerasekera researcher |
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| manjula manoji weerasekera researcher ORCID ID = 0000-0002-8194-2205 |
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| akila weerasekera |
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Mr, Sahan, Suren, Sunil, Anura, Anoja, Aruni, Amshi, Asoka, Saroj, Ajith, Colin, Kiran, Pasan, Paddy, Penny, Peggy, Ruwan, Devin, Chris, Megha, Medha, Manoj, Ms, Sam, Amy, Dan, Don, Ian, Uma, Mano, Anne, Anil, Aida, Avin, Paul, Ravi, Dona, Jude, Nila, Neil, Mario, Deepa, and Dinuk