Surname Хойслер (Heusler 
, Хойслер 
, Häussler 
) , worldwide, is quite a rare last name. The surname Хойслер is habitual in Western Europe, particularly Switzerland, where it is quite a rare surname, Germany, and Austria, where it is a rare surname. Not in comparison with a country's population, it is commonest in Germany, Switzerland, and the United States.