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.
Archduke Joseph Franz of Austria
He was the seventh child born to his parents: Marie Louise was born in 1791, and later became Empress consort of the French, as wife of Napoleon I Bonaparte; Ferdinand was born in 1793 and later became Emperor of Austria, but was dethroned due to the fact that he was severely (mentally and physically) disabled; Marie Caroline was born in 1794, but died less than a year later in 1795; Caroline Ludovika was born in 1795, but died two years later in 1797; Marie Leopoldina was born in 1797 and became the first Empress consort of Brazil, as the wife of Pedro I of Brazil; and, finally, Clementina was born in 1798 and became Princess of Salerno, as the wife of Leopold, Prince of Salerno.