Cognomen Koelli (Koelli 
, Kölli 
) , in the entire world, is a rare family name. The family name Koelli is characteristic of Austria, where it is quite a rare surname, Finland, where it is a rare surname, and Germany, where it is a very rare surname. Very seldom, Koelli is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koelli | Brazil, India, United States, Germany, Austria |
| Kölli | Germany, Finland, Austria |