Family name Зенн (Senn 
, Зенн 
) , all around the world, is a common cognomen. The surname Зенн is characteristic of Western Europe, particularly Liechtenstein, where it is quite a common surname, Switzerland, and Austria. In absolute terms, it is the most numerous in Switzerland, the United States, and Germany. Very seldom, Зенн is the forename as well as the last name.