Holders

• 1 Lope Sanchez de Ulloa, 1st count of Altamira
• 2 Urraca de Moscoso, 2ª countess of Altamira * c. 1410
• 3 Rodrigo de Moscoso Osorio, 3rd count of Altamira * c. 1450
• 4 Lope de Moscoso Osório, 4th count of Altamira * c. 1490
• 5 Rodrigo de Moscoso Osório, 5th count of Altamira * c. 1530
• 6 Lope de Moscoso Osorio, 6th count of Altamira * c. 1555
• 7 Gaspar de Moscoso Osorio, 7th count of Altamira * c. 1600
• 8 Luis de Moscoso Osorio, 6th marquess of Almazan * c. 1660
• 9 António Gaspar Osorio de Moscoso y Aragon, 9th count of Altamira * 1689
• 10 Ventura Antonio Osorio de Moscoso y Guzman Davila y Aragon, 14th marquess of Astorga * 1707
• 11 Ventura Osorio de Moscoso y Fernández de Córdoba, 15th marquess of Astorga * 1731
• 12 Vicente Joaquín Osorio de Moscoso y Guzmán, marquess de Astorga * 1756
• 13 Vicente Ferrer Isabel Osorio de Moscoso y Alvarez de Toledo, duke of Sessa * 1777
• 14 Vicente Pio Osorio de Moscoso, 15th count of Altamira * 1801
• 15 José María Osório de Moscoso y Carvajal, 18th duke of Maqueda * 1828
• 16 Francisco de Asís Osório de Moscoso y Borbón, 17th duke of Sessa * 1847
• 17 Francisco de Asis Osorio de Moscoso y Jordán de Urries, 19th marquess of Astorga * 1874
• 18 Gerardo Osorio de Moscoso, count of Altamira * 1903
• 19 Leopoldo Baron y Osorio de Moscoso, 19th duke of Sessa * 1920
• 20 Gonzalo Baron y Gavito, 20th duke of Sessa * 1948

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