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Juan Francisco Pacheco y Téllez-Girón, 4th Consort Duke of Uceda, (Madrid, Spain, 8 June 1649 – Vienna, Austria, 25 August 1718), was a Spanish noble, viceroy of Sicily and Spanish Ambassador in Rome.
Subsequently he entered the service of Francesco Ferdinando d'Avalos, viceroy of Sicily, and moved to Naples, where he decided to embark on a religious career and joined the Jesuits.