Holders

• 1 Alexandre de Sousa e Holstein, 1st count of Calhariz * 1812
• 2 Domingos de Sousa Holstein, 2nd duke of Palmela * 1818
• 3 D. Maria Luísa de Sousa Holstein, 3ª duquesa de Palmela * 1841
• 4 Domingos de Sousa e Holstein Beck, 5th duke of Palmela * 1897
• 4 Luis Maria da Assunção de Sousa e Holstein Beck, 6th duke of Palmela * 1919
• 5 Pedro Domingos de Sousa e Holstein Beck, 7th duke of Palmela * 1951

Sources

• Nobreza de Portugal e Brasil - 3 vols-vol. 2-pg.465
• Anuário da Nobreza de Portugal 1985-Tomo I-pg. 33

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