Surname Каетан (Kajetan 
, Cajetan 
, Kaetan 
) , worldwide, is quite a common cognomen. The surname Каетан is habitual in Poland, where it is quite a rare surname, Nigeria, and Cameroon, where it is a rare surname. Likewise, Каетан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kajetan | Nigeria, Germany, Poland, Austria, India |
| Cajetan | Nigeria, Germany, Cameroon, Austria, India |
| Kaetan | Tanzania, Canada, United Kingdom, United States, India |
| Каетан | Kazakhstan, Ukraine |