In Greek mythology, Charon ("fierce brightness") was the ferryman of Hades. (Etruscan equivalent: Charun) He took the newly dead from one side of the river Acheron to the other if they had an obolus (coin) to pay for the ride. Corpses in ancient Greece were always buried with a coin underneath their tongue to pay Charon. Those who could not pay had to wander the banks of the Acheron for one-hundred years.
He was depicted as a cranky, skinny old man or a winged demon with a double hammer.