Ogmios (also known as Ogmius; Ancient Greek: Ὄγμιος; Latin: Ogmius, Ogimius) was the Celtic deity of eloquence. He looked like an older version of Heracles who would use his powers of persuasion to bind men to himself.
Most of the knowledge about Ogmios comes from comparisons between him and powerful deities and heroes in other ancient cultures.
Even though there is not much on the history of Ogmios, we can tell that he was a powerful deity worshipped by the Gauls, the Celtic people of France. He is attested not only in Lucian's account, but also in archaeological remains, such as coins and statuary, from the time of the Roman conquest of the Gauls.
French specialists give two different explications of the Gaulish name: Philippe Jouët proposed to connect Ogme to the Indo-European root word *Hek- ‘sharp’, ‘stone’, ‘vault’, and to the Greek akmon (meteorite).
According to Xavier Delamarre, the root word would be ‘path’, ‘guide’, confirming in this his role as a psychopomp.
Ogmios was recorded by Lucian, a satirical writer in 2nd-century Samosata in his Prolalia-Heraklès. He is described as resembling an older, more tanned version of Heracles, the Greek hero of strength. Ogmios and Heracles both wear lion skins and carry a bow and club in their hands. However Ogmios is depicted with long chains through his smiling mouth that pierce his tongue and attached to the ears of a group of men that willingly and happily follow him. Anne Ross describes dark complexion as "a not uncommon feature of powerful or malevolent supernatural beings".