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.
Infanta Maria Doroteia of Portugal
Doroteia was born in September 1739 in Lisbon and was the third of four daughters of King Joseph. She was named after her great-grandmother, Dorothea Sophie of Neuburg. She was a proposed bride for Philippe d'Orléans, Duke of Orléans (later known as "Philippe Égalité"), but she refused to marry him.