Princess Madeleine, Duchess of Parma and Piacenza was the titular Duchess of Parma and Piacenza and was also Carlist Queen of Spain as the wife of Prince Xavier of Bourbon-Parma, the Carlist pretender
Duchess Marie Madeleine of Parma in 1970
Madeline de Bourbon-Busset, Duchess of Parma at the baptism of her grandson, Prince Carlos de Bourbon, Duke of Parma, held at Château de Lignières, France, in 1970
Prince Sixtus Henry of Bourbon-Parma, known as Enrique V by supporters, is considered Regent of Spain by some Carlists who accord him the titles Duke of Aranjuez, Infante of Spain, and Standard-bearer
Madeleine de Bourbon-Busset
…Princess Marie des Neiges of Bourbon-Parma (born 29 April 1937), she was named Countess of Castillo de la Mota by her father. She never married; Prince Sixtus Henry of Bourbon-Parma (born 22 July 1940), he was named Duke of Aranjuez by his father. He never married…