Cognomen クーン (Khun 
, Koen 
, Kuhn 
) , worldwide, is a widespread surname. The surname クーン is habitual in Mongolia, where it is a widespread surname, Switzerland, where it is quite a common surname, and Germany (explore the name in all countries). Measured by absolute frequency, it is commonest in Germany, the United States, and Mongolia. Likewise, クーン is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khun | Belgium, United States, Mongolia, Myanmar, Germany |
| Koen | Brazil, Belgium, United States, Myanmar, Germany |
| Kuhn | Brazil, United States, South Africa, Myanmar, Germany |