Charles Edward, Duke of Saxe-Coburg and Gotha
Charles Edward (Leopold Charles Edward George Albert; 19 July 1884 – 6 March 1954) was at various points in his life a British prince and royal duke, a German duke, and a Nazi politician. He was the last ruling Duke of Saxe-Coburg and Gotha, a state of the German Empire, from 30 July 1900 to 14 November 1918.
Source: Wikipedia — Charles Edward, Duke of Saxe-Coburg and Gotha (CC BY-SA 4.0)