Coriolanus probably never existed. As a historical personage, his veracity or otherwise is almost impossible to ascertain, but modern historians such as Philip Matyszak seem to think that ‘Coriolanus is probably fictional.’
Matyszak includes a section on the figure of Coriolanus in his chronicle of the rulers of the Roman Republic, but he is very cautious when it comes to delineating the man himself, preferring to see him as part of a wider range of personages from the early days of the Republic who function in certain ways:
Many of the figures of early Rome may indeed be foundation legends. However, each of these legends is probably based to some degree on fact. Coriolanus is less probable than most, but the Romans believed that he existed, and this tells us something about the Romans.