Board Thread:General Discussion/@comment-6302057-20160307065615/@comment-1916997-20160328132054

NickM98 wrote:

CoolDudeAl wrote:

NickM98 wrote: Regardless of any speculation, as of 5x15 we can now canonically name four of the rivers:
 * River of Lost Souls - green (named in 5x14)
 * Styx - blue (shown in 5x14)
 * Cocytus - grey (shown in 5x14)
 * Lethe  - yellow (shown in 5x15)

Only the lava river (likely to be Phlegethon) remains. River of Lost Souls is more a title than a name, the name of that river is most likely Acheron. As I said a few comments ago, the Acheron will likely be reserved for the river that Charon transports people across. I doubt they will ever name the river that Charon was on in the show. The five rivers surrounding Hades's throne room will be the five rivers of the Underworld. It doesn't make sense for 4 of them to be the names from the Greek Myths, and the 5th to be "The River of Lost Souls".