Last name پيروز (پيروز 
, Pirouz 
) , all over the world, is quite a rare cognomen. The cognomen پيروز is characteristic of Iran, where it is quite a rare surname, Denmark, where it is a rare surname, and Germany, where it is a very rare surname. Measured by absolute frequency, it is commonest in Iran, the United States, and Germany. Also, پيروز is the forename as well as the last name.