Ptolemaïs (tolumā'īs) [key], ancient name given to several cities to honor members of the dynasty of the Ptolemies. One of these later became known as Akko, in modern Israel. Another was one of the great Hellenistic cities of Upper Egypt, on the Nile and N of Abydos. A third, in Cyrenaica, was one of the cities of the Libyan Pentapolis.