Cognomen Bandaranaike (Bandaranaike 
) , across the world, is a rare surname. The cognomen Bandaranaike is habitual in Sri Lanka, where it is quite a rare surname, Australia, where it is a very rare surname, and the United Kingdom. Measured by absolute frequency, this name is the most popular in Sri Lanka, Indonesia, and Australia.
| VARIANT | COUNTRY |
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| Bandaranaike | Australia, United States, United Kingdom, Indonesia, Sri Lanka |
| harry dias bandaranaike Sri Lankan judge (b. 1822) |
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| solomon dias bandaranaike Ceylonese colonial headman, LK (b. 1862) |
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sunethra bandaranaike Sri Lankan politician, LK (b. 1943) |
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| s. d. bandaranaike (b. 1917) |
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| felix dias bandaranaike Sri Lankan politician, LK (b. 1930) |
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| j. c. dias bandaranaike |
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Mr, Daniel, Lalith, Janaka, Maithri, Sakitha, Shalini, Romesh, Srinatx, Chamith, Rashika, Ashanthi, Beverley, Chandrika, Dilrukshi, Avanthi, Rachel, Aendra, Senali, Sue, Alex, Anil, Gama, Ovin, Saman, Chris, Brian, Gihan, Tucky, Tōru, Heppy, Marcel, Mallie, Sudesh, Geraldine, and Niranjali