 Penn named the city Philadelphia, which is Greek for "brotherly love," derived from the Ancient Greek terms φίλος "phílos" (beloved, dear) and ἀδελφός "adelphós" (brother, brotherly).The city of Amman was also named Philadelphia during its Greek and Roman periods, and was mentioned as the site of an early Christian congregation in the Book of Revelation.As a Quaker, Penn had experienced religious persecution and wanted his colony to be a place where anyone could worship freely.