Surname Siriwardena (Siriwardena 
) , in the entire world, is a common cognomen. The cognomen Siriwardena is habitual in Sri Lanka, where it is quite a common surname, United Arab Emirates, where it is a rare surname, and Switzerland. Not in comparison with a country's population, it is the most numerous in Sri Lanka, Australia, and United Arab Emirates. Much less frequently, Siriwardena is the forename as well as the last name.
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| Siriwardena | Australia, United Arab Emirates, Indonesia, Sri Lanka, Switzerland |
| h. de z. siriwardena (b. 1898) |
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| m. p. de z. siriwardena (b. 1906) |
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| regi siriwardena Sri Lankan writer (1922-2004), LK (b. 1922) |
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| chandrika siriwardena Sri Lankan songstress (b. 1948) |
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| himali siriwardena actor, LK |
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| ajith siriwardena researcher |
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| mithra siriwardena Sri Lankan politician |
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| thissa n siriwardena researcher |
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| ajith kumar siriwardena British academic, LK |
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| gavin m siriwardena researcher (ORCID 0000-0003-2010-1186) |
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| kanagarathna mudiyanselage dhanushka layanthi siriwardena researcher (ORCID 0000-0002-3305-510X) |
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| aloysius niroshan siriwardena researcher |
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| komudi siriwardena researcher |
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| ajith k siriwardena researcher (ORCID 0000-0001-8004-0560) |
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Mr, Anaka, Anura, Anoma, Aruna, Amaya, Amila, Asiri, Akila, Avril, Susan, Ajith, Kamal, Kasun, Kevin, Kumar, Kusal, Ranga, Rahal, Ruwan, Devin, Brian, Sunil, Sihan, Shani, Ms, Roe, Don, Leo, Jad, Eli, Amal, Phil, Ravi, Daya, Niro, Vinu, Upul, Manik, Manel, Manju, Mahen, Mohan, M H I, Sanka, Sahan, Dasun, and Diana