小アントニア
At some unknown date, Alexander was appointed Alabarch of Alexandria. The alabarch was a magistrate responsible for customs in Alexandria. Later Alexander became an administrator for the extensive land estates in Egypt, owned by Antonia Minor. Antonia Minor was a Roman noblewoman, who was the niece of Emperor Augustus and the youngest daughter of the triumvir Mark Antony. Alexander had been a long-time friend of Antonia Minor’s youngest child, the future Emperor Claudius.