In the dedication from Ueß (Mayen), Mercurius is associated with a Celtic epithet Excingiorigiatus: In h(onorem) d(omus) d(ivinae) deo Mercurio Excingiorigiati et Ro[s]mert(a)e C. Satu[r]ninius Viriaucus v(otum) s(olvit) l(ibens) l(aetus) m(erito). Aedem d(ono) d(edit), ‘In Honour of the Divine House, to Mercurius Excingiorigiatus and Rosmerta, C. Satuninius Viriaucus paid his vow willingly, gladly and deservedly. He offers this temple at his own expense’.⁸⁸⁰ The use of the votive formulas In h. d. d. and deo prove that the inscription dates from the first half of the 3rd c. AD.⁸⁸¹ The first element of this byname* ex-cingo-, with ex-, ‘out of’ and cingo-, ‘warrior’ or ‘hero’, means ‘the one who leaves to attack’ or ‘the one who goes forward’.⁸⁸² It seems clear that the second element rigiatis is cognate with Gaulish rix, ‘king’ (< *rīx, *rīgos).⁸⁸³ Excingiorigiatus may therefore be glossed as ‘King of Warriors’ or ‘He who Rules the Attackers’.⁸⁸⁴ Excingiorigiatus could be interpreted either as an epithet given to Mercurius or as the name of an individual indigenous god, later juxtaposed to Mercurius through the process of the interpretatio Romana. Lambert, however, points out that Excingiorigiatus is derived from a proper name Excingiorix or a gentilice* Excingiorigius, which would be the name of the owner of the property to which Mercurius belonged.⁸⁸⁵ The dedicator bears the tria nomina of the Roman citizens; his cognomen* is Celtic though: Viriaucus (<*Viriāco-).⁸⁸⁶ This must indicate that his father was a peregrine* of Celtic origin.