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.
Princess Charlotte of Württemberg
Princess Charlotte of Württemberg (9 January 1807 – 2 February 1873) was later known as Grand Duchess Elena Pavlovna, the wife of Grand Duke Michael Pavlovich of Russia. He was the youngest son of Emperor Paul I of Russia and Duchess Sophie Dorothea of Württemberg.