Princess Marie of Prussia, was a princess of the House of Hohenzollern. She was the daughter of Prince Frederick Charles of Prussia and later became second wife of Prince Henry of the Netherlands then the first wife of Prince Albert of Saxe-Altenburg. She was also the great-niece of Wilhelm I, German Emperor.

Anna Pavlovna of Russia was Queen of the Netherlands by marriage to King William II of the Netherlands. She was a Russian patriot who upheld a strict royal etiquette in the Netherlands, where she never felt at home, and identified more as an Imperial Russian grand duchess than a Dutch queen. She had no political influence, but was active within charity.