Cognomen Kalupahana (Kalupahana 
) , in the world, is quite a common family name. The surname Kalupahana is habitual in Sri Lanka, where it is quite a common surname, United Arab Emirates, where it is a rare surname, and New Zealand. Measured by absolute frequency, it most frequently occurs in Sri Lanka, Saudi Arabia, and Indonesia. Very seldom, Kalupahana is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kalupahana | Australia, United Arab Emirates, Indonesia, Sri Lanka, Saudi Arabia |
| david kalupahana Sri Lankan Buddhist scholar and philosopher (1936–2014), LK (b. 1936) |
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| kalupahana irushi pamodya liyanage researcher |
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| nishan sudheera kalupahana researcher (ORCID 0000-0001-7129-5588) |
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| devinda kalupahana Sri Lankan general |
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Mr, Menaka, Menoji, Sanira, Sarath, Saraph, Sasika, Sawani, Shiran, Shyama, Manoja, Sumudu, Asanka, Ayesha, Achini, Channa, Kanthi, Densil, Dayani, Dinesh, Dilini, Sujith, Udith, Isuru, Nalin, Anil, Anju, Ravi, Tony, Neil, Manoj, Aruni, Amali, Ashan, Berny, Kamal, Kasun, Piumy, Ranga, Ranil, Ruwan, Devin, Diluk, Disna, Gayan, Tania, Gamini, and Lakshi