3rd century) was an aristocrat who held a number of imperial appointments, most notably consul in AD 288.
Originally a member of the Equestrian order, Januarianus served as the Praefectus Aegypti from 282 to 284 under the emperor Numerian.
[1] He transferred his loyalty to the incoming emperor Diocletian, who rewarded him with advancement into high office.
[2] Sometime between 284 and 289, Januarianus was adlected into the Roman senate, and served as Praetorian prefect to Diocletian at some point.
[3][4] In 288 Januarianus was granted the office of consul posterior as the colleague of the emperor Maximian.