Holders

• 1 Diogo de Castro do Rio, 1st lord of Barbacena * c. 1500
• 2 Martim de Castro do Rio, 2nd lord of Barbacena * c. 1548
• 3 Luis de Castro do Rio, 3rd lord of Barbacena * c. 1590
• 4 Jorge Furtado de Mendonça, 4th lord of Barbacena * c. 1590
• 11 Francisco Furtado de Castro do Rio de Mendonça, 2nd count and 7th viscount of Barbacena * 1780

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