Cognomen Romanni (Romanni 
) , all over the world, is a very rare family name. The surname Romanni is habitual in Latin America and the Caribbean, particularly Argentina, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Brazil. Measured by absolute frequency, this name is the most popular in Argentina, Brazil, and the United States. Very seldom, Romanni is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Romanni | Ukraine, Argentina, Brazil, Venezuela, United States |