Kto umawiał się z Archduke Otto of Austria (1865–1906)?

Archduke Otto Franz Joseph Karl Ludwig Maria of Austria (21 April 1865 – 1 November 1906) was the second son of Archduke Karl Ludwig of Austria (younger brother of Emperor Franz Joseph I of Austria) and his second wife, Princess Maria Annunziata of Bourbon-Two Sicilies. He was the father of Charles I of Austria, the final Emperor of Austria.