Quintus Servilius Caepio, (Died 59 BC) was the son of Quintus Servilius Caepio the Younger and Livia Drusa, and the full brother to Servilia, mother of Caesar's assassin Marcus Junius Brutus. Caepio served as a tribune in the Third Servile War and adopted the son of his sister Servilia, Marcus Junius Brutus in his will, who for a period of time changed his name to Quintus Servilius Caepio Brutus to honor his uncle.