Maria Isabel de Alcântara Bourbon (São Paulo, 28 February 1830 – 5 September 1896) was the third daughter (fifth child) of Emperor Pedro I of Brazil and his mistress, Domitila de Castro, Marchioness of Santos. On 2 September 1848, at the age of eighteen, Maria Isabel married Pedro Caldeira Brant, the Count of Iguaçu, son of Felisberto Caldeira Brant, Marquis of Barbacena. At their wedding, Maria Isabel became the second Countess of Iguaçu. The couple had seven children: She died on 5 September 1896, at sixty-six years of age, in São Paulo.