That phrase means "white mountain" in French. Interestingly, the Spanish version is about the same, as is the Italian. All three languages derive from Latin.
Mont Blanc is the name of the highest peak of the Mont Blanc Massif at the border from France with Italy. The Mont Blanc is with his 4810.90 meters the highest mountain in the Alps and is covered with the ice-layer of 32 meters thick. Literally the name means white mountain.
