Baltasar Guzmán (c. 1577 - October 1598) was a Captain in the Spanish army stationed in London after the conquest of England by the Duke of Parma in 1588. Guzmán's distant family connection to Alonso Pérez de Guzmán, 7th Duke of Medina Sidonia, who had commanded the Spanish Armada that ferried Parma's troops from the Netherlands, allowed Guzmán to rise rapidly in the ranks in spite of his youth and lack of military experience. Guzmán's privileges included an office for his own use and a personal secretary at his service, Enrique.