Throughout the world, Castani (Castani 
) is an extremely rare gender-neutral forename. More prevalently, Castani is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Castani | France, Indonesia, Germany, Democratic Republic of the Congo, Italy |
| pomponio castani man from Milan, lived in the 16th century, member of the Archconfraternity of the SS. Trinity of Rome, IT |
|