In all the world, Хаслер (Hasler 
, Hassler , Хаслер 
) is a rare principally male, but very infrequently feminine first name. The first name Хаслер is habitual in Switzerland, where it is a rare gender-neutral name, Guatemala, where it is a rare masculine name, and the Democratic Republic of the Congo. Much more prevalently, Хаслер is the last name as well as the forename.