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 Sweden
On 25 July 1819 in Karlsruhe, Sophie married her half-grand-uncle Leopold I of Baden. They became the paternal grandparents of the Swedish Queen consort Victoria of Baden.