The Cernic tradition was an ancient religion native to mainly ancient Gaul, Alpine Germany, and Cisalpine Gaul; and which also seemed to exist in Iberia, some parts of Scandinavia, and perhaps elsewhere.
Cernunnos (also Cernenus and Cern) is a Celtic god whose representations were widespread in the ancient Celtic lands of western Europe. Cernunnos is associated with horned male animals, especially stags and the ram-horned snake; this and other attributes associate him with produce and fertility.
Everything known about this deity comes from two inscriptions from France and one from Germany.
A rock carving of Cernunnos in the National park of Naquane, Italy.
Cernunnos was proposed to have been identified as the illustration on the Snake-witch picture stone, which shows a possibly horned figure holding snakes in his/her hands, from Gotland, Sweden.
Archaeological sources such as inscriptions and depictions from Gaul and Northern Italy (Gallia Cisalpina) have been used to define Cernunnos.
[Music: 'Lacrimae Lugus' by Crystalmoors
"Celtic/Pagan Black Metal band from Cantabria, Spain" (YouTube user BlackDeath)