What did Dussel do for a living - Story of Anne Frank?

Fritz Pfeffer. But he was given the alias of Albert Dussel in the story to protect the families of the deceased. In Anne's originally published diary, her pseudonym names for everyone were kept, but startying with editions published in the early 1980's and beyond, the real names of the persons are used. In the caseof Fritz Pfefer, the named "Dussel" has significance. Anne and Pfeffer did not get along at all, and Anne gave him the pseudonym "Dussel" which in German means "jerk" or "nitwit".