What does Comun mean when seen on a bottle of Brazilian wine?

Therefore, "Comun" on a Brazilian wine bottle would likely indicate that the wine is a common or standard variety, perhaps produced using common grape varietals or following common winemaking techniques.

It's important to note that "Comun" might also be a specific brand or designation used by a particular winery, so it's always helpful to check with the winery or distributor for clarification.