Cognomen Gayanika (Gayanika 
) , in the world, is a rare surname. The surname Gayanika is habitual in Southern Asia, particularly Sri Lanka, where it is a rare surname, and India, where it is an extremely rare surname. Likewise, Gayanika is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gayanika | India, Sri Lanka |