Charontas

A boatman in ancient Greek mythology who ferries souls of the dead across the River Styx; another name for Charon.

From Greek Charon (Χάρων), the mythological ferryman. The plural or variant form adds the -tas suffix. The name may derive from Proto-Indo-European roots meaning 'fierce' or 'sharp,' reflecting his stern role as a boundary guardian between the living and dead.