Brutus was married to a woman named Sempronia. His son was Decimus Junius Brutus Albinus, one of the assassins of Julius Caesar (not to be confused with his distant cousin and fellow assassin Marcus Junius Brutus). Historian Ronald Syme proposed that Brutus may have been married to another woman before Sempronia, a Postumia who could have been a sister of the wife of Servius Sulpicius Rufus, he states that it is possible that this Postumia could have been Decimus Junius Brutus Albinus mother instead of Sempronia.