1st century BC) was a Roman politician and tribune of the people (tribunus plebis).
Soon afterward, Flavus and Marcellus had citizens arrested after they called out the title Rex to Caesar as he passed by on the streets of Rome.
[1] Plutarch told that as the tribunes arrested people for saluting Caesar as King, crowds applauded, calling them Brutuses—not after Marcus Junius Brutus, not yet the assassin of Caesar, but after Lucius Junius Brutus, a possibly apocryphal figure who had led a coup against the despotic last king, Tarquin the Proud, thereby founding the Roman Republic.
Here Shakespeare has confounded the cognomen Flavus with the gentile name Flavius, which is derived from the surname.
As in history, Flavius and his fellow tribune (here named "Marullus" or "Murellus") are punished for removing decorations from statues of Caesar during a parade.