Tiara set with pearls cameos  for Hortense de Beauharnais, Queen of Holland, who gave it to her niece Josephine of Leuchtenberg on the occasion of her marriage to Prince Oscar of Sweden, the future King Oscar. (Swedish Royal Collection)  Hortense Eugénie Cécile Bonaparte  was the stepdaughter of Emperor Napoleon I, being the daughter of his first wife, Joséphine de Beauharnais.