"Frederick Francis IV (Friedrich Franz Michael; 9 April 1882 – 17 November 1945) was the last Grand Duke of Mecklenburg-Schwerin and regent of Mecklenburg-Strelitz. He inherited ...
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the throne when he was fifteen years old in 1897 and was forced to renounce it in 1918." - (en.wikipedia.org 10.05.2020)