A Iardanus in Elis is referred to in passing in Iliad (Book VII.135), where Nestor remembers Pylians and Arcadians gathered in fight by the rapid river Celadon under the walls of Pheia, and round about the waters of the river Iardanus. Strabo (VII.3.12) notes, in describing the coast of Elis "After Chelonatas comes the long sea-shore of the Pisatans; and then Cape Pheia. And there was also a small town called Pheia: 'beside the walls of Pheia, about the streams of Iardanus,' for there is also a small river near by. According to some, Pheia is the beginning of Pisatis."
Yet in the 2nd century CE, Pausanias reports (v.5.9), of a sulfurous-smelling river that descends from the mountain Lapithus in Arcadia, called the Acidas, "I heard from an Ephesian that the Acidas was called Iardanus in ancient times. I repeat his statement, though I have nowhere found evidence in support of it." Cyrus H. Gordon was the first to point out that Jordan in the Hebrew Bible is not a proper name, but, with two exceptions, always appears with a qualifier, and suggested that on an early linguistic level it may relate to the rivers in Crete and in the Greek mainland as the word "river". In the Mandaean cosmological accounts Jordan plays an important part, the "river of living water"; Mandaeans resist the connection with the geological River Jordan.
- Georg Autenrieth. A Homeric Dictionary for Schools