Holders

• 1 João Nepomuceno de Macedo, 1st baron of São Cosme * 1790
• 2 Josefa Henriqueta Girão de Macedo, 2ª baroness of São Cosme * 1863
• 3 Francisco de Paula de Macedo de Portugal e Castro, 3rd baron of São Cosme * 1890
• 4 António Pizarro de Mello e Sampaio de Macedo de Portugal e Castro, 4th baron of São Cosme * 1929
• 5 D. Francisco de Paula de Macedo de Portugal e Castro, 5º barão de São Cosme * 1958

Sources

• Nobreza de Portugal e Brasil - 3 vols-vol. 3-pg. 316-317

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