The son of Arcadio (José Arcadio III) and Santa Sofía de la Piedad, Aureliano Segundo may have been switched at birth with his twin brother, José Arcadio Segundo. He falls in love with Petra Cotes and remains with her until his death although he is married to the cold beauty Fernanda del Carpio. They have three children: Meme, José Arcadio (IV) and Amaranta Úrsula. Despite an early interest in solitary study—characteristic of his great-uncle, Colonel Aureliano Buendía—as Aureliano Segundo grows he begins to show all the characteristics of the family's José Arcadios. He is immense, boisterous, impulsive and hedonistic.