Louis I, Grand Duke of Hesse
In 1776, he became engaged to Sophie Dorothea of Württemberg, eldest daughter of Frederick II Eugene, Duke of Württemberg. The engagement was broken off so that Sophia Dorothea could marry Louis's recently widowed brother-in-law Tsarevich Paul Petrovich, son and heir of Catherine II "the Great", Empress of Russia. He received a monetary compensation when the engagement was broken.
Marie Louise, Duchess of Parma
After escaping an assassination attempt in Vienna while negotiating the Treaty of Schönbrunn on 12 October 1809, Emperor Napoleon decided that he needed an heir to cement his relatively young Empire. He also sought the validation and legitimization of his Empire by marrying a member of one of the leading royal families of Europe. He began proceedings to divorce Joséphine de Beauharnais, who did not bear him a son, and began searching for a new empress. His wish to marry Grand Duchess Anna Pavlovna of Russia, the youngest daughter of Tsar Paul I of Russia, caused alarm in Austria, who were afraid of being sandwiched between two great powers allied with each other. At the persuasion of Count Metternich, a marriage between Napoleon and Marie Louise was suggested by Emperor Francis to the Count of Narbonne but no official overture was made by the Austrians. Though officials in Paris and Austria were beginning to accept the possibility of the union, Marie Louise was kept uninformed of developments.