Lugus

Lugus (sometimes Lugos^[1] or Lug^[2]: 123) is a Celtic god whose worship is attested in the epigraphic record. No depictions of the god are known. Lugus perhaps also appears in Roman sources and medieval Insular mythology.

Various dedications, concentrated in Iberia and dated to between the 1st century BCE and the 3rd century CE, attest to the worship of the god Lugus. However, these predominately describe the god in the plural, as the Lugoves. The nature of these deities, and their relationship to Lugus, has been much debated. Only one, early inscription from Peñalba de Villastar, Spain is widely agreed to attest to Lugus as a singular entity. The god Lugus has also been connected with the common element "Lug(u)-" in Celtic onomastics and toponymy (for example, in the name of the Roman settlement Lugdunum).

Julius Caesar's description in Commentarii de Bello Gallico of an important pre-Roman Gaulish god (whom Caesar identified with the Roman god Mercury) has been interpreted as a reference to the god Lugus. Caesar's description of Gaulish Mercury has been examined against Insular sources, as well as the prominence of "Lug(u)-" elements in Gaulish toponymy. A prominent cult to Mercury in Roman Gaul may provide more evidence for this identification.

Lugus has also been connected with two figures from medieval Insular mythology. In Irish mythology, Lugh is an important and supernatural figure. His description as a skilled artisan and founder of a harvest festival has been compared with Gaulish Mercury. In Welsh mythology, Lleu Llaw Gyffes, a protagonist of the Fourth Branch of the Mabinogi, is a more minor figure, but is linked etymologically with Irish Lugh. He perhaps shares with the Lugoves an association with shoemaking.

The reconstruction of a pan-Celtic god Lugus from these details, first proposed in the 19th century by Henri d'Arbois de Jubainville, has proven controversial. Criticism of this theory by scholars such as Bernhard Maier has caused aspects (such as a Celtic festival of Lugus) to be abandoned, however scholars still defend the reconstruction.