Hannibalianus, born in the year three hundred fifteen, was a prominent figure in the Constantinian dynasty, which held sway over the Roman Empire during the fourth century. As the son of Flavius Dalmatius and nephew to the illustrious Constantine the Great, Hannibalianus was steeped in a legacy of power and influence from an early age. His education at Tolosa under the tutelage of the rhetor Exuperius further prepared him for a life of public service and military engagement.
In the early three hundreds, Hannibalianus and his brother Dalmatius were summoned to Constantinople by their uncle, Constantine. In three hundred thirty-five, he solidified his position within the imperial family by marrying Constantina, the elder daughter of Constantine. This union elevated him to the status of nobilissimus, and together they may have had a daughter named Constantia, who would later marry Memmius Vitrasius Orfitus, becoming the mother of Rusticiana, the wife of Quintus Aurelius Symmachus.
During the campaign against the Sassanids in three hundred thirty-seven, Hannibalianus was appointed as Rex Regum et Ponticarum Gentium, translating to 'King of the Kings and of the Pontic Peoples.' This title suggested that Constantine intended to place Hannibalianus on the Pontic throne following a successful military campaign against the Persians. However, the anticipated campaign never materialized due to Constantine's untimely death in May of that year.
Tragically, Hannibalianus met his end in the purge that followed the death of Constantine, alongside his brother, father, and other relatives. Historical accounts suggest that he was in Constantinople during a military mutiny, making his demise a poignant chapter in the tumultuous history of the Constantinian dynasty.