Gaius Claudius Marcellus can refer to: Gaius Claudius Marcellus (praetor 80 BC), Roman governor of Sicily Gaius Claudius Marcellus, son of Marcus Claudius Marcellus, a Catilinarian conspirator, possibly related to the consul in 50 BC. Gaius Claudius Marcellus (consul 50 BC) Gaius Claudius Marcellus (consul 49 BC)