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Surname Kajetan (Gaetano
, Kajetan
, Каетан
) , all over the world, is a common last name. The cognomen Kajetan is habitual in Malta, where it is quite a common surname, Italy, where it is quite a rare surname, and Poland. Not in comparison with a country's population, the name is most common in Italy, Poland, and the United States. More prevalently, Kajetan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gaetano | Italy, Poland, United States, Afghanistan, Germany |
| Kajetan | Italy, Poland, France, United States, Germany |
| Каетан | Kazakhstan, Ukraine |
| Каєтан | Ukraine |