Throughout the world, Castañuela (Castañuela 
) is an extremely rare unknown gender first name. Much more prevalently, Castañuela is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Castañuela | Spain, Venezuela, Mexico, United States |
Ana, Leslie, Alondra, Claudia, Rodrigo, Jessica, Erubiel, Debbie, Salatiel, Leonardo, Fernando, Alejandro, Alejandra, Guadalupe, Concepcion, Cristian, Esmeraldha, Carlos, Alexis, Mary, Luis, Jose, Juan, Mario, Mayra, Arturo, Mirsa, Belen, Karla, Linda, Jesus, Edgar, Miguel, Santi, and Miguel Angel