Surname Jayathunga (Jayathunga 
) , in the entire world, is quite a common cognomen. The cognomen Jayathunga is habitual in Sri Lanka, where it is quite a common surname, United Arab Emirates, where it is a rare surname, and Saudi Arabia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jayathunga | Saudi Arabia, United Arab Emirates, Italy, Sri Lanka, Malaysia |
| mervyn jayathunga Sri Lankan actor (1940-1993), LK (b. 1940) |
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| hemamali chathurangani yashika jayathunga Dr. rer. nat. Technische Universität Kaiserslautern 2019 |
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