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 Sophie of Hohenberg
Princess Sophie of Hohenberg ("Sophie Marie Franziska Antonia Ignatia Alberta von Hohenberg"; – ) was the only daughter of Archduke Franz Ferdinand of Austria and his morganatic wife Sophie, Duchess of Hohenberg, both of whom were assassinated at Sarajevo on 28 June 1914. Their assassination triggered the First World War, thus Sophie and her two brothers are sometimes described as the first orphans of the First World War.