The name Pishon in the Bible
The Pishon is the first of four rivers in Eden (the others are Gihon, Haddakel and Parat — Genesis 2:11-14). The Haddakel and Parat are known today as the Tigris and Euphrates, but the Pishon and Gihon seem to have no alter-ego's in observable reality. Of the river Pishon it is said that it "flows around the whole land of Havilah, where there is gold" (Genesis 2:11).
One (slightly daring) theory is that these four rivers represent the supersymmetry that may or may not lay at the heart of creation. Another, slightly less daring, is that the Pishon is the Indus.
Etymology of the name Pishon
In Hebrew the name Pishon could be derived from פוש (push) meaning to spring about or to be scattered:
Here at Abarim Publications we suspect that the name Pishon may be a Hebraized form of the Sanskrit name for the Indus, namely Sindhu (hence the names India and Hindu). The word Sindhu consists of sim, meaning region, and dhu, meaning to shake or tremble. Since the Pishon is the first river, the Pi- part may even come from פה (peh), meaning mouth:
The name Pishon possibly refers to a river that originates from a spring and forms into a delta. Jones' Dictionary of Old Testament Proper Names reads Great Diffusion. NOBSE Study Bible Name List reads Freely Flowing.
Here at Abarim Publications we propose Mouth Of The Region or even Valley Region.