The name of the second river is Gihon; it runs through the entire land of Cush.
Referenced Verses
Gen 10:6 : 6 The sons of Ham were Cush, Mizraim, Put, and Canaan.
Isa 11:11 : 11 At that time the Lord will again lift his hand to reclaim the remnant of his people from Assyria, Egypt, Pathros, Cush, Elam, Shinar, Hamath, and the seacoasts.