Cognomen Карлис (Karlis 
, Kārlis 
, Karlys 
) , in the entire world, is quite a rare surname. The family name Карлис is characteristic of Greece, where it is quite a rare surname, Estonia, and Latvia. Measured by absolute frequency, this name is the most popular in Greece, Venezuela, and Indonesia. More frequently, Карлис is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karlis | Greece, Venezuela, Latvia, Indonesia, Afghanistan |
| Kārlis | Germany, Ireland, United Kingdom, United States, Latvia |
| Karlys | Colombia, Venezuela, United States, Mexico, Honduras |
| Карлис | Kazakhstan, Russia |