Mercury (/ˈmɜːrkjʊri/; Latin: Mercurius [mɛrˈkʊrijʊs] (About this soundlisten)) is a major god in Roman religion and mythology, being one of the 12 Dii Consentes within the ancient Roman pantheon. He is the god of financial gain, commerce, eloquence, messages, communication (including divination), travelers, boundaries, luck, trickery and thieves; he also serves as the guide of souls to the underworld.

In Roman mythology, he was considered to be either the son of Maia, one of the seven daughters of the Titan Atlas, and Jupiter, or of Caelus and Dies. In his earliest forms, he appears to have been related to the Etruscan deity Turms; both gods share characteristics with the Greek god Hermes. He is often depicted holding the caduceus in his left hand. Similar to his Greek equivalent Hermes, he was awarded a magic wand by Apollo, which later turned into the caduceus, the staff with intertwined snakes.

Hermes (/ˈhɜːrmiːz/; Greek: Ἑρμῆς) is an Olympian deity in ancient Greek religion and mythology. Hermes is considered the herald of the gods. He is also considered the protector of human heralds, travellers, thieves, merchants, and orators. He is able to move quickly and freely between the worlds of the mortal and the divine, aided by his winged sandals. Hermes plays the role of the psychopomp or "soul guide" — a conductor of souls into the afterlife.

In myth, Hermes functioned as the emissary and messenger of the gods, and was often presented as the son of Zeus and Maia, the Pleiad. He is regarded as "the divine trickster," for which Homer offers the most popular account in his Hymn to Hermes.

His attributes and symbols include the herma, the rooster, the tortoise, satchel or pouch, talaria (winged sandals), and winged helmet or simple petasos, as well as the palm tree, goat, the number four, several kinds of fish, and incense. However, his main symbol is the caduceus, a winged staff intertwined with two snakes copulating and carvings of the other gods. His attributes had previously influenced the earlier Etruscan god Turms, a name borrowed from the Greek "herma".