Cognomen Guariño (Guariño 
) , throughout the world, is a very rare surname. The last name Guariño is habitual in Uruguay, where it is a rare surname, Philippines, where it is a very rare surname, and Chile, where it is an extremely rare surname. Much less frequently, Guariño is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guariño | Uruguay, Chile, Venezuela, Peru, Philippines |