Across the world, Giambruno (Giambruno 
) is a very rare epicene first name. The forename Giambruno is habitual in Southern Europe, particularly Italy, where it is a rare gender-neutral name. More frequently, Giambruno is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Giambruno | Argentina, Italy, Chile, United States, Uruguay |