Didius Julianus (Látìnì: Marcus Didius Severus Julianus Augustus; 30 January 133 tabi 2 February 137 – 1 June 193), je Obaluaye Romu fun osu meta ni odun 193. O gun ori ite leyin ti o ti fowo ra latowo awon Eso Praetoria, leyin ti awon wonyi ti sekupa asaju re Pertinax. Eyi lo fa Ogun Abele Romu 193–197 wa. Julianus je lile kuro lori ite, o si bo sowo iku latowo aropo re, Septimius Severus. In Classical Latin, Julianus' name would be inscribed as MARCVS DIDIVS IVLIANVS AVGVSTVS.