Cognomen Данци (Danzi 
, Данци 
) , in the world, is quite a rare last name. The family name Данци is habitual in Italy, where it is quite a rare surname, Uruguay, and Switzerland, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Italy, the United States, and Argentina. Much less frequently, Данци is the forename as well as the last name.