Family name Colettis (Colettis 
) , in all the world, is a very rare surname. The cognomen Colettis is characteristic of Australia, where it is a very rare surname, Argentina, and France, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in the United States, Australia, and Argentina.
| VARIANT | COUNTRY |
|---|---|
| Colettis | France, Argentina, Australia, United States, Germany |