• Born date: n.a.
  • Born in: n.a.

Mar. Silbannacus is a mysterious figure believed to have been a usurper in the Roman Empire during the time of Philip the Arab (244-249), or between the fall of Aemilianus and the rise to power of Valerian (253).Silbannacus had been known only from a single coin, an antoninianus reputedly found in Lorraine, which is now at the British Museum. This coin has an obverse with the portrait of the usurper and the legend IMP MAR SILBANNACVS AVG (Imperator Mar.