Charon is indeed the ferryman of Greek mythology, who transports the departed across the river Acheron to Hades. Nowadays many people think that Charon ferried souls across the river Styx, but according to most contemporary accounts, and also Dante's Inferno, it was Acheron.

Like all good things the Greeks had, the Romans adopted him as one of their own.

Also like all good things the Greeks had, Charon has been integrated into Dungeons & Dragons, where he is a type of being known as an altroloth, lord of the yugoloths. The D&D version plies the river Styx, mangling the myth in the finest traditions of this venerable game.