Cognomen Руис (Ruiz 
, Ruis , Ruíz ) , in the world, is a prevalent surname. The cognomen Руис is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is a prevalent surname, Mexico, where it is a widespread surname, and Colombia (explore the name in all countries). In absolute terms, it is commonest in Latin America and the Caribbean, particularly Mexico, Colombia, and Argentina. Very seldom, Руис is the forename as well as the last name.