Original: The first Duchy of Saxe-Eisenach was created in 1596 , on the death of Johann Frederick II of Saxe-Coburg-Eisenach , for his younger son , Johann Ernst .
Simplified: History The first Duchy of Saxe-Eisenach was created in 1596 for Johann Ernst , younger son of Johann Frederick II of Saxe-Coburg-Eisenach .