Family name Пейро (Peiro 
, Пейро 
, Peiró 
) , all around the world, is quite a common last name. The surname Пейро is characteristic of Spain, where it is quite a rare surname, Paraguay, and Argentina, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Spain, France, and Mexico. Likewise, Пейро is the forename as well as the last name.