A descendant of the preceding, and son of Cato Uticensis's sister; much beloved by Cæsar and Cæsar's friend, but persuaded by Cassius and others to believe that Cæsar aimed at the overthrow of the republic; joined the conspirators, and was recognised by Cæsar among the conspirators as party to his death; forced to flee from Rome after the event, was defeated at Philippi by Antony and Augustus, but escaped capture by falling on a sword held out to him by one of his friends, exclaiming as he did so, "O Virtue, thou art but a name!" (85-42 B.C.).