Marie Gabrielle Duchess in Bavaria, was the youngest daughter of Duke Karl Theodor in Bavaria and his second wife, Infanta Maria José of Portugal. She married Prince Rupprecht of Bavaria in 1900 but died before he became Crown Prince. Through her second son Albrecht, Marie Gabrielle was the grandmother of the present Duke of Bavaria, Franz.

Karl-Theodor, Duke in Bavaria, was a member of the House of Wittelsbach and a professional oculist. He was the favorite brother of the Empress Elisabeth of Austria, and father of Queen Elisabeth of the Belgians.