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.
Sophia Dorothea of Hanover
Sophia Dorothea was born on 16 March 1687 (O.S.), in Hanover. She was the only daughter of George Louis of Hanover, later King George I of Great Britain, and his wife Sophia Dorothea of Celle. She was detested by her elder brother, King George II of Great Britain.