Family name Valessi (Valessi 
) , in the entire world, is a very rare cognomen. The cognomen Valessi is characteristic of Argentina, where it is a very rare surname, Italy, where it is an extremely rare surname, and Peru. Measured by absolute frequency, it is the most numerous in Argentina, Brazil, and Italy. Very seldom, Valessi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Valessi | Peru, Brazil, Italy, Argentina |