Cognomen Warnaka (Warnaka 
) , around the globe, is a rare last name. The cognomen Warnaka is habitual in Sri Lanka, where it is a rare surname, and the United States, where it is an extremely rare surname. Also, Warnaka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Warnaka | Sri Lanka, United States |