Family name Понци (Ponzi 
, Понци) , all over the world, is quite a rare last name. The family name Понци is characteristic of Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and France. Measured by absolute frequency, the name is most common in Italy, the United States, and Argentina. Much less frequently, Понци is the forename as well as the last name.