Marcellus (usurper)

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (September 2023) (Learn how and when to remove this message)

Marcellus (Greek: Μάρκελλος; died 366) was an officer of the Roman Empire, supporter of usurper Procopius and briefly an usurper himself.

There are two versions of the history of his usurpation, the first told by Ammianus Marcellinus, a contemporary historian, the second exposed by Zosimus, a historian of the beginning of the 6th century.