Philadelphia, the name of two ancient cities. The word comes from the Greek for “brotherly love.”

Philadelphia in eastern Palestine was originally Rabbath Ammon. It was the chief city of the Ammonites, a Semitic tribe often at war with the Hebrews. The city was renamed under Ptolemy II Philadelphus of Egypt (285–246 B.C.) and was made a center for Greek settlers. Amman, capital of Jordan, occupies the site.

Philadelphia in Asia Minor was about 75 miles (120 km) east of Smyrna (Izmir). It was founded about 150 B.C. and named for Attalus II Philadelphus, king of Pergamum. Alasehir, Turkey, occupies the site.