Marcus Livius Drusus
He likely had a son named Quintus from an early marriage to an unknown woman. Caepio later married Livia, sister of Marcus Livius Drusus, around 100 BC. Caepio and Livia had three children: Servilia, the mistress of Julius Caesar, mother of Brutus, and mother-in-law of Gaius Cassius Longinus; another daughter Servilia Minor; and a son, Gnaeus Servilius Caepio.