Cognomen הסלר (Hasler 
, הסלר 
, Hässler 
) , all around the world, is a common last name. The family name הסלר is characteristic of Western Europe, particularly Liechtenstein, where it is a widespread surname, Switzerland, where it is quite a common surname, and Austria, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Switzerland, Germany, and the United States. Much less frequently, הסלר is the forename as well as the last name.