Pishon
PISHON, PISON (pī’shŏn, Heb. pîshôn). First of the four rivers of Eden, flowing around the whole land of Havilah (Gen.2.11). Conjectures as to its identification are almost as numerous as the rivers of SW Asia, and include the Persian Gulf thought of as a river, and even the Nile.
International Standard Bible Encyclopedia (1915)
pi’-son (pishon; the King James Version): A river of EDEN (which see), said to compass the whole land of Havilah where there is gold, bdellium and onyx stone (Ge 2:11), most probably identified with the Karun River which comes down from the mountains of Media and formerly emptied into the Persian Gulf.