Cognomen Vianni (Vianni 
) , throughout the world, is a rare family name. The last name Vianni is habitual in Greece, where it is a rare surname, Venezuela, and Italy, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Indonesia, Brazil, and Italy. Also, Vianni is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vianni | Brazil, Italy, Dominican Republic, Venezuela, Indonesia |