Meaning and information about Antonio, What does Antonio mean? Antonio means 'Two Gentlemen of Verona' Father to Proteus. 'The Merchant of Venice' The merchant. 'Much Ado About Nothing' Brother to Governor of Messina. 'The Tempest' The usurping Duke of Milan. 'Twelfth Night' (What You Will) A sea captain, friend of Sebastian. Find similar names like Antonio.