Philadelphia

From Latin Philadelphia, from Ancient Greek Φιλαδέλφεια (Philadélpheia), from φιλάδελφος (philádelphos, “brother/sibling-loving”) + -εια (-eia, “-ia: forming placenames”), from the combining form of φῐλέειν (phĭléein, “to love”) + ἀδελφός (adelphós, “brother, sibling”). In reference to the city in Turkey, named for the loyal Attalus II Philadelphus of Pergamon. In reference to the city in Jordan, named for the incestuous Ptolemy II Philadelphus of Egypt. In reference to the American city, named for the ancient towns as well as the Quaker William Penn's aim of fostering religious tolerance. Doublet of Filadelfia.