His nickname from 1934 was the Fuhrer
He was also called Ade , Ahi
He also used the name Herr Wolf when traveling in secrecy in his early day .
He also called : Grosster Feldherr aller Zeiten
He also called : Oberster Gerichsher
You ask for his nickname but he doesn't have only 1 nickname so that's why I give you all of that but there might be more.