Through either the deaths or morganatic marriages of his elder brothers, George was the head of the Russian branch of the House of Beauharnais.
•
On 12 May 1879, Therese married George Maximilianovich, 6th Duke of Leuchtenberg (1852–1912), youngest son of Maximilian de Beauharnais, 3rd Duke of Leuchtenberg and his wife Grand Duchess Maria Nikolaevna of Russia.
Oldenburg | Catherine, Duchess of Cambridge | Sarah, Duchess of York | Claes Oldenburg | Camilla, Duchess of Cornwall | Marie Louise, Duchess of Parma | Princess Louise, Duchess of Argyll | House of Oldenburg | County of Oldenburg | Duchess of Cambridge | Sarah Lennox, Duchess of Richmond and Lennox | Duchess of York | Duchess of Kent | Maria Teresa, Grand Duchess of Luxembourg | Grand Duchy of Oldenburg | Duchess of Cornwall | Duchess Charlotte Georgine of Mecklenburg-Strelitz | Catherine of Brunswick-Wolfenbüttel, Duchess of Saxe-Lauenburg | Princess Madeleine, Duchess of Hälsingland and Gästrikland | Princess Alice, Duchess of Gloucester | Oldenburg in Holstein | Natalia Grosvenor, Duchess of Westminster | Maria Vladimirovna, Grand Duchess of Russia | Georgiana Cavendish, Duchess of Devonshire | Duchess Theatre | Duchess of Gloucester | Birgitte, Duchess of Gloucester | Therese of Saxe-Hildburghausen | Princess Olga, Duchess of Apulia | Oldenburg (district) |