Holders

• 1 Juan de Vega y Toledo, 1st count of Grajal
• 2 Pedro de Vega, 2nd count of Grajal * c. 1590
• 8 Manuel José Álvar Osorio Vega Enríquez de Guzmán, 6th marquess of Montaos * c. 1675
• 9 Francisco Javier Osorio y Guzmán, 13rd marquess of Alcañices * 1709
• 11 Manuel Miguel Osorio y Spinola, 7th duke of Sesto * 1757
• 13 José Isidro Osorio y Silva-Bazán, 16th duke of Alburquerque * 1825
• 15 Miguel Osorio y Martos, 19th duke of Alburquerque * 1886
• Beltran Alfonso Osorio y Diez de Rivera, 20th duke of Alburquerque * 1918
• Juan Miguel Osorio y Bertran de Lis, 21st duke of Alburquerque * 1958

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