Last name ロスト (Rost 
, ロスト) , worldwide, is a common surname. The last name ロスト is characteristic of Germany, where it is quite a common surname, Denmark, where it is quite a rare surname, and Argentina. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Brazil. Much less frequently, ロスト is the forename as well as the last name.