Duane Quack is the brother of Hubert and Louise Quack and the son of Elizabeth Quack and Horatio Quack. He and the rest of his family were captured by Snively and held hostage until Dr. Quack agreed to work with Snively. They were later set free and reunited with Horatio. (StH #49)
- Like the other Quack children, Duanne's name is based off one of Donald Duck's nephews: in this case, Duey.