In the entire world, Costanzi (Costanzi 
) is a rare epicene forename. The forename Costanzi is characteristic of Southern Europe, particularly Italy, where it is a rare unisex name. Predominantly, Costanzi is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Costanzi | Malta, Italy, United States, Argentina, Brazil |