"Johann Frederick III, also known as Johann Frederick the Younger (16 January 1538 in Torgau – 21 October 1565 in Jena) was German nobleman. He was ...
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a titular Duke of Saxony from the Ernestine branch of the House of Wettin. He received Saxe-Gotha as an apanage, but left its administration to his eldest brother." - (en.wikipedia.org 09.10.2020)
