Hermes is the name of a Greek God. He was the second son of Zeus, and his mother was the goddess Maia. Hermes was the god of commerce, and traveling. He was the 'Giver of good things.' Hermes also is the god of knowledge, communication, teaching and of medicine. (He was patron of both healers and teachers). His main role however was as herald of Zeus, as Messenger of the Gods.
His attributes are a winged helmet, winged feet, and the caduceus: the staff with snake(s) that still is the symbol for medicine. (According to the myth, Hermes used his staff to separate two fighting snakes. Hence the staff is also a symbol of peace.)
Hermeticism, also called Hermetism or the Hermetic Tradition,is a religious, philosophical, and esoteric tradition based primarily upon writings attributed to Hermes Trismegistus ("Thrice Great"). These writings have greatly influenced the Western esoteric tradition and were considered to be of great importance during both the Renaissance and the Reformation. The tradition claims descent from a prisca theologia, a doctrine that affirms the existence of a single, true theology that is present in all religions and that was given by God to man in antiquity.