Graius is a Celtic god worshipped in Gaul; his name may translate to “terrible one.”

He was sometimes identified by the Romans with their god Hercules by way of the interpretatio romana. Typically the Romans identified the Gaulish god Ogmios with Hercules, equating physical strength with persuasive and rhetorical abilities; it is possible that Graius shared some characteristics with Ogmios as well.

Myth
Unknown.

Cult
Graius received votive and dedicatory offerings from his worshippers; otherwise little is known of the specifics of his cult.

Etymology
I’ve seen it suggested that Graius’ name is derived from the Proto-Celtic *gragnos or “horror, terror, grief.”

Region
Graius was worshipped in what is now the Savoie region of France.

Literary evidence
Unknown.

Archaeological evidence
Aime, France; Salins-les-Thermes, France