Surname Auðunn (Auðunn 
) , across the world, is an extremely rare family name. Much more prevalently, Auðunn is the forename as well as the last name.
Sverrisson, Karlsson, Gissurarson, Eiríksson, Ólafsson, Sigurðsson, Guðmundsson, Björgvinsson, Ragnarsson, Haraldsson, and Kristjánsson