The cognomen, Marianus, belongs to a group Marius/-inus/-janus which seems to have been particularly common among the Mediomatrici; it appears next in popularity to the Julius, Sextus, and Primus groups. The name Marcellus or Marceleus, though less frequent, is, none the less, still popular in this area.
—Walters (1974) The Cult of Mithras in the Roman provinces of Gaul
The Tauroctony of Saarbourg (Sarrebourg, ancient Pons Sarravi), France, contains most of Mithras deeds known in a single relief.
In h(onorem) d(omus) d(ivinae) deo inv[ict]o Marceleus Marianus / d(e) / s(uo) p(osuit)