[[Image:Le_Pilier_des_Nautes_06.jpeg|320px|thumb|right|Relief of Smertrius from the [[Pillar of the Boatmen]], [[Paris]].「船乗りの柱」に描かれたスメルトリウスのレリーフ(パリ)。]]
In [[Gallo-Roman religion]], '''Smertrios''' or '''Smertrius''' was a god of [[war]] worshipped in [[Gaul]] and [[Noricum]].<ref>Nicole Jufer & Thierry Luginbühl. 2001. ''Les dieux gaulois : répertoire des noms de divinités celtiques connus par l'épigraphie, les textes antiques et la toponymie.'' Editions Errance, Paris.</ref> In [[Roman Empire|Roman]] times he was equated with [[Mars (mythology)|Mars]]. His name contains the same root as that of the goddess [[Rosmerta]] and may mean "The Purveyor" or "The Provider", a title rather than a true name. '''Smertulitanus''' may be a variant name for the same god.