Infanta Pilar of Spain, Duchess of Badajoz, Dowager Viscountess of la Torre ("María del Pilar Alfonsa Juana Victoria Luisa Ignacia y Todos los Santos de Borbón y Borbón-Dos Sicilias"; 30 July 1936 – 8 January 2020), sometimes known more simply as Pilar de Borbón, was a member of the Spanish royal family. She was oldest child of Infante Juan, Count of Barcelona and Princess María Mercedes of Bourbon-Two Sicilies. She was the older sister of King Juan Carlos I, Infanta Margarita and Infante Alfonso.