Princess Frederica Charlotte of Prussia (Friederike Charlotte Ulrike Katharina; 7 May 1767 – 6 August 1820) was a Prussian princess by birth and a British princess by marriage. She was the eldest daughter of King Frederick William II of Prussia and the wife of Prince Frederick, Duke of York and Albany , second son of King George III of the United Kingdom .
Princess Victoria of Saxe-Coburg-Saalfeld Princess Feodora of Leiningen (Anna Feodora Auguste Charlotte Wilhelmine; 7 December 1807 – 23 September 1872) was the only daughter of Emich Carl, Prince of Leiningen (1763–1814), and Princess Victoria of Saxe-Coburg-Saalfeld (1786–1861).
Sophie is the French form of the Greek Sophia, for which it is also commonly used as a nickname. Sophies are scattered throughout European royal history, including Sophie of Thuringia, Duchess of Brabant, Princess Sophie of Sweden, and in modern times, Sophie, Duchess of Wessex, the wife of Britain's Prince Edward.