Last name Пій (Pio 
, Pijus 
, Пій 
) , throughout the world, is a common cognomen. The family name Пій is characteristic of Cabo Verde, where it is quite a common surname, Nicaragua, where it is quite a rare surname, and Brazil. Measured by absolute frequency, this name is the most popular in Brazil, Mexico, and Philippines. Likewise, Пій is the forename as well as the last name.