Cognomen マスト (Mast 
, マスト 
, Masuto 
) , in the world, is a common last name. The family name マスト is characteristic of Western Europe, particularly Netherlands, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Germany. Not in comparison with a country's population, it is the most numerous in the United States, Germany, and Netherlands. Likewise, マスト is the forename as well as the last name.