ロイヒテンベルク公
Prince Eugen Maximilianovich Romanowsky, 5th Duke of Leuchtenberg (8 February 1847 – 31 August 1901) was a son of Maximilian de Beauharnais, 3rd Duke of Leuchtenberg and Grand Duchess Maria Nikolaevna of Russia Duke of Leuchtenberg. He succeeded his brother Nicholas Maximilianovich as Duke of Leuchtenberg from 1891 until his death.