Cognomen Ненци (Nenzi 
, Ненци) , throughout the world, is a rare family name. The last name Ненци is habitual in Italy, where it is a rare surname, Belgium, where it is a very rare surname, and Switzerland. Measured by absolute frequency, it is commonest in Italy, Brazil, and France. Likewise, Ненци is the forename as well as the last name.