Port Antonio dates from 1723, when the town was called  Titchfield  after the English estate of the Duke of Portland, who was governor of Jamaica at the time.
Port Antonio has only recently been opened.
mnli hypothesis: Port Antonio has only recently been opened. premise: Port Antonio dates from 1723, when the town was called  Titchfield  after the English estate of the Duke of Portland, who was governor of Jamaica at the time.