Family name Хаслер (Hasler 
, Hassler , Хаслер 
) , in all the world, is a common last name. The last name Хаслер is habitual in Western Europe, particularly Liechtenstein, where it is a widespread surname, Switzerland, where it is quite a common surname, and Austria. Measured by absolute frequency, it is the most numerous in Switzerland, the United States, and Germany. Much less frequently, Хаслер is the forename as well as the last name.