Surname סרנו (Sereno 
, Serano , סרנו 
) , in the entire world, is a common last name. The family name סרנו is characteristic of Belize, where it is quite a common surname, Portugal, where it is quite a rare surname, and Italy. Measured by absolute frequency, this name is the most popular in Mexico, Brazil, and Italy. Much less frequently, סרנו is the forename as well as the last name.