When the Roman poet Lucan wanted to show the savagery of Gaulish religion, he used the bloodthirsty cults of three Gaulish gods to make his point: Taranis, Toutatis and Esus. While the first two had well-established cults in Gaul and Britain, Esus is more elusive.
The god Toutatis occupies a interesting place in the Gallic pantheon. His name, which means “of the tribe,” could equall well be a title, perhaps hiding another name. Against this, however, we have many artifacts, espeically rings, with his name on them, suggesting it was the commonly-used name for this god.
He is best-known from the Roman writer Lucan, who counts Taranis, Esus and Toutatis as notable for their desire for blood. (And presumably because they were major Gaulish gods.) Although it’s tempting to see them as a Gaulish answer to the Roman Jupiter, Mars and Quirinus, there’s no evidence to back this.