Cognomen Premadasa (Premadasa 
) , in all the world, is quite a rare surname. The surname Premadasa is habitual in Sri Lanka, where it is quite a common surname, Qatar, where it is a rare surname, and Australia, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Sri Lanka, Indonesia, and Qatar. Very seldom, Premadasa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Premadasa | Indonesia, United Kingdom, Qatar, Sri Lanka, India |
| hema premadasa politician, LK (b. 1935) |
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| premadasa hegoda Sri Lankan sitarist, IN (b. 1940) |
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| uvinduni i premadasa researcher (ORCID 0000-0003-0289-2965) |
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| muditha premadasa Sri Lankan cricketer |
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Mr, Bianca, Pavani, Prabad, Priyal, Dilini, Dilina, Lahiru, Jagath, Jaques, Ayesha, Tharka, Hewage, Indika, Ishara, Iresha, Wajira, Maryian, Mangala, Malinda, Salinda, Nadini, Amanda, Anguru, Alexis, Raja, Ruan, Lana, Manoj, Saman, Amila, Ayomi, Kasun, Ramya, Dasun, Dihan, Lynne, Lydia, Nalin, Nuwan, Indra, Udara, Sajith, Sidath, Surath, Sekani, Sampath, and Asanthi