Fernando Calderón de la Barca, 1st Marquis of Reinosa
Don Fernando Calderón de la Barca y Collantes, 1st Marquis of Reinosa (Reinosa, Spain, 21 February 1811 – Madrid, Spain, 9 January 1890) was a Spanish noble and politician who served as Minister of State between 1875 and 1877. Second son of Manuel Santiago Calderón de la Barca y Rodríguez-Fontecha, Senator for Cantabria, and his wife Saturnina Collantes y Fonegra. His eldest brother Saturnino Calderón de la Barca y Collantes, also a prominent politician who held important offices.