Early 18th century. From classical Latin pentapolitanus of or belonging to a pentapolis (from ancient Greek πεντάπολις + classical Latin -itānus), originally after French Pentapolitain.
Definition of pentapolitan in US English:
pentapolitan
adjectiveˌpɛntəˈpɒlɪt(ə)n
Of or relating to a pentapolis.
Origin
Early 18th century. From classical Latin pentapolitanus of or belonging to a pentapolis (from ancient Greek πεντάπολις + classical Latin -itānus), originally after French Pentapolitain.