In all the world, Castagnino (Castagnino 
) is a very rare epicene given name. The first name Castagnino is characteristic of Italy, where it is a very rare epicene name, and China, where it is an extremely rare male name. Much more prevalently, Castagnino is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Castagnino | Paraguay, Brazil, Italy, Argentina, Peru |
Castagñino, and Цастагнино