Cognomen Монтаг (Montag 
, Монтаг 
) , worldwide, is quite a common surname. The last name Монтаг is characteristic of Germany, where it is quite a rare surname, Luxembourg, and Israel. Not in comparison with a country's population, the name is most common in Germany, the United States, and France. Very seldom, Монтаг is the forename as well as the last name.