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.
Paul of Greece
On 9 January 1938, Paul married Princess Frederica of Hanover, his first cousin once removed through Frederick III, German Emperor, and Victoria, Princess Royal, and second cousin through Christian IX of Denmark, at Athens. They had three children:During most of World War II, from 1941 to 1946, when Greece was under German occupation, Paul was with the Greek government-in-exile in London and Cairo. From Cairo, he broadcast messages to the Greek people.