there are lots of famous vineyards, and not always big ones.
Some famous and very expensive wines (Château-Margaux, Château-Cheval-blanc, Petrus, Château-Lafitte-Rotchild, ...) are brand names...
Bordeaux and Bourgogne are two regions with the 'grand crus' classification system (which is quite disputed nowadays, and seen by some as obsolete and overated).
No, it hasn't. At the time of the Roman Empire, it was called 'Gaul' in reference to the Gaulish tribes living there. The rising of the Frankish tribe at the time and after the fall of the roman...