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In page Princess María Teresa of Bourbon-Parma:

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Princess Marie Thérèse was born on 28 July 1933 in Paris.[1] She was the daughter of Prince Xavier of Bourbon-Parma, Duke of Parma and Piacenza, a Carlist claimant to the Spanish throne, and Madeleine de Bourbon-Busset, a member of a cadet branch of the House of Bourbon.[citation needed] She was the younger sister of Princess Marie Françoise and Carlos Hugo, Duke of Parma, and an older sister of Princess Cécile Marie, Princess Marie des Neiges and Prince Sixtus Henry, Duke of Aranjuez. She was a niece of Zita of Bourbon-Parma, the last Empress of Austria and Queen of Hungary and Bohemia.[2]