Last name Guanto (Guanto 
, Guant 
) , around the world, is a rare cognomen. The family name Guanto is characteristic of Bolivia, where it is a rare surname, Italy, where it is a very rare surname, and Chile, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Bolivia, Italy, and Brazil. Very seldom, Guanto is the forename as well as the last name.