Maria Feodorovna (Sophie Dorothea of Württemberg)
Born Duchess Sophie Dorothea of Württemberg, she was a daughter of Friedrich II Eugen, Duke of Württemberg and his wife, Friederike Dorothea of Brandenburg-Schwedt. She belonged to a junior branch of the House of Württemberg and grew up in Montbéliard receiving an excellent education for her time and station. In 1776, when Grand Duke Paul (the future Paul I of Russia), became a widower, Sophie Dorothea was chosen by Frederick II of Prussia, her maternal great uncle, and by Empress Catherine II of Russia, as the ideal candidate to be Paul’s second wife. They met in a state dinner in Berlin and their engagement was quickly arranged.
Paul-Philippe Hohenzollern
In 1918, the crown prince of Romania (the future King Carol II) married Zizi Lambrino. The wedding was annulled the following year because it contravened the royal house's statute—Lambrino was both a Romanian and a commoner, and the marriage took place without the consent of the king. The couple had one son, Carol Lambrino, the father of Paul Hohenzollern. In 1921, Crown Prince Carol married Princess Helen of Greece and Denmark, and they had a son who became King Michael I of Romania.