Esus or Hesus ("lord" or "master") was a Gaulish god known from two monumental statues and a line in Lucan's Bellum civile.
A well-known section in Lucan's Bellum civile talks about the gory sacrificial offerings proffered to a triad of Celtic deities: Teutates, Hesus (sic), and Taranis. Among a pair of later commentators on Lucan's work, one identifies Teutates with Mercury and Esus with Mars. According to the Berne Commentary on Lucan, human victims were sacrificed to Esus by being tied to a tree and flailed.[1] These Commentaries come from the 9th Century AD, though, and their source is in doubt.
The given name Esunertus (strength of Esus) occurs at least once as an epithet of Mercury on a dedicatory inscription.[2]
It is possible that the Esuvii of Gaul, in the area of present-day Normandy, took their name from this deity.[3]
The 18th-century Druidic revivalist Iolo Morgannwg identified Esus with Jesus on the strength of the similarity of their names. He also linked them both with Hu Gadarn, writing:
"Both Hu and HUON were no doubt originally identical with the HEUS of Lactantius, and the HESUS of Lucan, described as gods of the Gauls. The similarity of the last name to IESU [Welsh: Jesus] is obvious and striking."[4]
This identification is still made in certain Neo-Druidic circles. Modern scholars consider the resemblance between the names Esus and Jesus to be coincidental.