Marquesses of Gibraltar Marqueses de Gibraltar Created by Isabella the Catholic, Queen of Castile and León Decree date 30-09-1478 First holder Enrique de Guzman y Menezes, 2nd duke of Medina Sidonia * c. 1430 Records #2 Holders Family filter On/Off 1 Enrique de Guzman y Menezes, 2nd duke of Medina Sidonia * c. 1430 2 Juan Alonso de Guzman, 3rd duke of Medina Sidonia * 1464 Corrections and Updates To suggest a correction or an update. Click Here