Dukes of Arjona Duques de Arjona Created by John II, king of Castile Decree date 01-09-1427 First holder Fadrique de Castilla, duke of Arjona * 1388 Present holder Cayetano Martínez de Irujo y FitzJames Stuart, 5th duke of Arjona * 1963 Records #5 Holders Family filter On/Off 1 Fadrique de Castilla, duke of Arjona * 1388 2 Fadrique de Aragón, count of Luna e Ejerica * c. 1400 3 Jacobo FitzJames y Falcó, 17th duke of Alba * 1878 4 Cayetana FitzJames Stuart, duchess of Alba * 1926 5 Cayetano Martínez de Irujo y FitzJames Stuart, 5th duke of Arjona * 1963 Corrections and Updates To suggest a correction or an update. Click Here