Cognomen ريسو (Riso 
, Risso , ريسو 
) , globally, is a common last name. The surname ريسو is habitual in Latin America and the Caribbean, particularly Uruguay, where it is quite a common surname, Argentina, and Paraguay (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Argentina, Italy, and Brazil. Much less frequently, ريسو is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Risso, Riso | Uruguay, Argentina, Brazil, Italy, United States |
| ريسو | Saudi Arabia, Egypt |
| Risø | Norway |