Last name Viato (Viato 
) , across the world, is a rare family name. The cognomen Viato is habitual in Guatemala, where it is a rare surname, Spain, where it is a very rare surname, and Argentina, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Guatemala, Spain, and Philippines. Very seldom, Viato is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viato | Philippines, Spain, India, Guatemala, Switzerland |