Cognomen Wijayathunga (Wijayathunga 
) , in all the world, is a rare family name. The cognomen Wijayathunga is characteristic of Southern Asia, particularly Sri Lanka, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wijayathunga | Sri Lanka |
| damith wijayathunga Sri Lankan model and actor, LK (b. 1991) |
|