Surname Gajetan (Gajetan 
) , in the world, is a very rare last name. The last name Gajetan is habitual in Trinidad and Tobago, where it is quite a rare surname, and Philippines, where it is an extremely rare surname. Much less frequently, Gajetan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gajetan | Trinidad and Tobago, Croatia, Philippines |