"Aureliano got undressed, tormented by shame, unable to get rid of the idea that his nakedness could not stand comparison with that of his brother" (52).
"It was she who, on her own initiative, put aside the largest piece that she had cut from her wedding cake and took it on a plate with a fork to Jose Arcadio Buendia" (80).
"Tell my wife...to give the girl the name of Ursula...Ursula, like her grandmother. And tell her also that if the child that is to be born is a boy, they should name him Jose Arcadio, not for his uncle, but for his grandfather" (119).
"If Aureliano Segundo had something of his great-grandfather in him and lacked something of Colonel Aureliano Buendia, it was an absolute indifference to mockery, and he gave the money to bring to the railroad with the same lighthearted air with which he had given it for his brother's absurd navigation project" (221).
In the novel, the Buendia family is bonded in more ways than blood. The second chapter of the novel reveals the incestuous nature of the family and Ursula's desperate attempt to remain celibate so she may not have defective children. When she does have children, however, they develop close and personal relationships with each other and with other people that define the character of their whole family.
Aureliano is constantly in competition with his elder brother, and this is peaked when he sleeps with Pilar Ternera and repeats his brother's fate by having a child with her, as well. He then falls in love with Remedios Moscote, a nine-year-old girl who dies shortly after their marriage when she has a miscarriage. The loss of his wife causes him to be thrown into chaos, into the civil war between the Conservatives and the Liberals. The loss of his wife causes him to throw himself into a cause, and eventually Colonel Aureliano fights not for the people of Macondo but for his own pride, becoming so miserable that he attempts to take his own life.
Rebeca isn't even related to the Buendia family by blood, as she is an orphan that was raised by Ursula as her own daughter. Yet, she is still in constant competition with Amaranta when they fall in love with the same man. Rebeca ends up marrying Jose Arcadio, Ursula's son that ran away with another woman earlier in the novel. One character even mentions that their marriage is both against nature and against the law (92), but they marry anyways and are happy until his death, when she becomes a recluse and is practically forgotten by her entire family. Amaranta subsequently gets the man they both loved, but she denies him and is condemned to a life of bitterness, even in her other romantic endeavors with Colonel Marquez and Colonel Aureliano's son, Aureliano Jose. Because of her bitter life, Amaranta dies as a virgin, mocked and shamed.
But in the end, the Buendia family is the center of the novel, and while they may or may not be bound by blood, there are ties that bind them all in various forms. The generations that follow Jose Arcadio Buendia are more like him, bringing the family and the story back in full circle to their past.