Felix Yusupov, Russian husband of Princess Irina Alexandrovna of Russia (b. 1887)

Prince Felix Felixovich Yusupov, Count Sumarokov-Elston (Russian: Князь Фе́ликс Фе́ликсович Юсу́пов, Граф Сумаро́ков-Эльстон, romanized: Knyaz' Féliks Féliksovich Yusúpov, Graf Sumarókov-El'ston; 23 March [O.S. 11 March] 1887 – 27 September 1967), was a Russian aristocrat from the Yusupov family. He is best known for participating in the assassination of Grigori Rasputin and marrying Princess Irina Alexandrovna, a niece of Tsar Nicholas II.