Cognomen Ruiiz (Ruiiz 
) , all over the world, is quite a rare last name. The surname Ruiiz is characteristic of Latin America and the Caribbean, particularly El Salvador, where it is quite a rare surname, Guatemala, and Colombia. In absolute terms, it is the most numerous in Latin America and the Caribbean, particularly Colombia, Guatemala, and Mexico.
| VARIANT | COUNTRY |
|---|---|
| Ruiiz | El Salvador, Dominican Republic, Colombia, Mexico, Guatemala |