Surname Дагни (Dagny 
, Dagný 
, Dagney 
) , around the globe, is a rare last name. The family name Дагни is characteristic of Iceland, where it is quite a rare surname, Honduras, where it is a rare surname, and Venezuela. Not in comparison with a country's population, it most frequently occurs in Venezuela, the United States, and Poland. More prevalently, Дагни is the forename as well as the last name.