Eugene Rose de Beauharnais, German Eugen Duke of Leuchtenberg and Prince of September 3, Eichstaett 1781 - February 21, 1824 was stepson of Napoleon I and was later adopted by this. He was in 1805 Viceroy of Italy and married Augusta of Bavaria. He teamed up in 1809 as commander out and was 1,810 pretender of the Grand Duchy of Frankfurt.