Rudolf (1858 – 1889) Archduke of Austria and Crown Prince of Austria-Hungary. In 1889, he died in a suicide pact with his mistress, Baroness Mary Vetsera, at the Mayerling hunting lodge, making Franz Ferdinand's father Karl Ludwig first in line to the throne of the Austro-Hungarian Empire..
Comte and Comtesse Lonyay. She was born Princess Stephanie Clotilde of Belgium. In 1881 at age 16 Stephanie was married to Crown Prince Rudolph of Austria. It was not a happy marriage and ended with Rudolph's and his girlfriend's murder suicide. But Stephanie was a survivor. She married again, Count Lonyay of Hungary, who adored her. Stephanie and her count had no children together but lived to know the four children of her daughter Archduchess Elizabeth Marie,