The slave ship Dois Irmãos arrived with enslaved Africans in Brazil. About 640 people had been taken aboard and approximately 580 arrived.

Vessel: Dois Irmãos; flag: Portugal / Brazil; rig: Brig; estimated standardized tonnage: 210. People recorded in connection with the voyage: Captain: Abreu, F F de. The voyage began at Rio de Janeiro on 21 July 1839. Principal recorded place where captives were acquired: Quilimane (East Africa and Indian Ocean islands). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 57 days. Recorded outcome: Voyage completed as intended.