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.
Dorothea of Denmark, Electress Palatine
Princess Dorothea was born on 10 November 1520 to King Christian II of Denmark and Norway and Isabella of Burgundy, sister of Holy Roman Emperor Charles V. Dorothea had an elder brother, Johann "Hans", born 21 February 1518. Her elder twin brothers, Philip Ferdinand and Maximilian, born 4 July 1519, had both died before her birth, the latter in 1519 and the former in 1520. Her sister Christina was born two years later, in 1522, and was her only sibling to reach adulthood. Christina would marry twice, first to Francis II, Duke of Milan, and secondly to Francis I, Duke of Lorraine.