Last name Rajapaksa (Rajapaksa 
, ราชสมัคร 
) , across the world, is quite a common cognomen. The last name Rajapaksa is habitual in Sri Lanka, where it is quite a common surname, Kuwait, where it is quite a rare surname, and Qatar. In absolute terms, it is the most numerous in Sri Lanka, Saudi Arabia, and Australia. Much less frequently, Rajapaksa is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rajapaksa | Australia, Kuwait, United Arab Emirates, Sri Lanka, Saudi Arabia |
| ราชสมัคร | Thailand |
| d. m. rajapaksa Sri Lankan politician, LK (b. 1896) |
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| lakshman rajapaksa Sri Lankan lawyer (1905-1969), LK (b. 1905) |
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| george rajapaksa Sri Lankan politician (1926-1976), LK (b. 1926) |
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| leticia rajapaksa (b. 1920) |
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| d. s. rajapaksa LK (b. 1922) |
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| shyamlal rajapaksa Sri Lankan lawyer (1966-2009), LK (b. 1966) |
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| raup rajapaksa (b. 1969) |
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| kaveesha rajapaksa researcher (ORCID 0000-0002-9568-3398) |
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| ushani s rajapaksa researcher ORCID ID = 0000-0002-6457-608X |
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| ioma rajapaksa First Lady of Sri Lanka from 2019 to 2022 |
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| n. rajapaksa botanist |
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| shamindra rajapaksa |
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| preethi rajapaksa |
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| don david rajapaksa |
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| p.s. rajapaksa |
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Mr, Ashan, Asiri, Asoka, Ajith, Basil, Kamal, Kasun, Peter, Rajiv, Rivin, Ruwan, Dilan, Durga, Dylan, Tilak, Nadun, Namal, Naomi, Nimal, Amila, Amaya, Aruna, Anula, Ms, Ka, Sam, Lal, Manu, Mala, Mapa, Rani, Daya, Nihal, Jaya, Nilu, Ioma, Manoj, Saroj, Saman, Sahan, Supun, Seema, Anura, Jude, and Erinn