how is Princess Yolanda of Savoy and Elena of Montenegro related?
Princess Yolanda of Savoy Princess Yolanda of Savoy (1 June 1901 – 16 October 1986) was the eldest daughter of King Victor Emmanuel III of Italy and his wife Queen Elena of Montenegro, and the sister of Umberto II, the last king of Italy.
Prince Amedeo, Duke of Aosta (b. 1943) Prince Amedeo, 5th Duke of Aosta (Amedeo Umberto Costantino Giorgio Paolo Elena Maria Fiorenzo Zvonimir di Savoia-Aosta; born 27 September 1943) is a claimant to the headship of the House of Savoy, the family which ruled Italy from 1861 to 1946. Until 7 July 2006 Amedeo was styled Duke of Aosta; on that date he declared himself Duke of Savoy, a title that is disputed between him and his third cousin, Vittorio Emanuele, Prince of Naples. In fact, Prince Amedeo is still referred to as "Duke of Aosta".