Pison

Concise Bible Dictionary:

One of the four “heads” or main streams into which the river divided that flowed through Eden (Gen. 2:1111The name of the first is Pison: that is it which compasseth the whole land of Havilah, where there is gold; (Genesis 2:11)). Not identified.

Strong’s Dictionary of Hebrew Words:

Number:
6376 (find all occurrences in KJV Bible)
Transliteration:
Piyshown
Phonic:
pee-shone’
Meaning:
from 6335; dispersive; Pishon, a river of Eden
KJV Usage:
Pison

Jackson’s Dictionary of Scripture Proper Names:

increase

Potts’ Bible Proper Names:

Great pouring forth; diffusion; over―flowing:―a river of Eden, Gen. 2:11. {Magna diffusio}