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 (empress)
According to the "Ecclesiastic History" of John of Ephesus, Sophia was a niece of Theodora, the Empress consort of Justinian I. John of Ephesus did not specify the identities of her parents. According to the Secret History of Procopius, Theodora had only two siblings: her older sister Comito and younger sister Anastasia; either one could be the mother of Sophia. Procopius identifies Comito as a leading hetaera of her age. John Malalas records that Comito (b. ca 500) married general Sittas in 528. Sittas may thus be the father of Sophia. Whether Anastasia ever married is unknown.