Greek Ἑρμῆς from ἕρμα herma, "block of stone, or stone pile."
The name Hermes comes from ερμενηυς Hermeneus, which means “the interpreter.” In Greek mythology, Hermes was the messenger of the gods. Hermes was known for his quality of speech, was a powerful speaker and could convince people. In other words, Hermes is related with the Word, or what in Greek is called λόγος, the Logos. Hermes conveys the knowledge and wisdom of the gods to the other gods and to human kind, and even into hell.
"Zeus who masses the clouds made answer... turned to his dear son Hermes: ‘Hermes, you are always our messenger.’" - Homer, Odyssey (8th century B.C.)
"Glorious Hermes, the herald of the deathless gods (keryx athanaton)..." - Hesiod, Theogony (8th or 7th century B.C.)
Hermes is also a symbol of that force of divinity that guides those who have died; he guides the dead to their next residence. He also guides souls out of the lower realms.
"Zeus himself... commanded that glorious Hermes... should be the appointed messenger to Haides...” - Homeric Hymn 4 to Hermes (7th to 4th century B.C.)
"The winged Herald [Hermes] visits Tartarus as ordered [by Zeus, to recover Persephone from Haides], returns quicker than hope...” - Ovid, Fasti (1st century B.C. to C1st A.D.)
All of us here, who are suffering in the lower worlds, need the help of Hermes Mercury if we are to get out.
The Greeks said that Hermes invented fire. In this sense, he is exactly the same as Prometheus, who delivered fire to mankind.
Study a lecture about Hermes: Mercury, Hermes