Marcianus, Gessius
a native of Syria, the husband of Julia Mamaea, by whom he was the reputed father of Alexander Severus. We know nothing of his history, except that he on several occasions discharged the duties of an imperial procurator. (D. C. 78.30.)
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.