Family name הירט (Hirt 
, הירט 
) , all over the world, is a common surname. The cognomen הירט is habitual in Western Europe, particularly Switzerland, where it is quite a common surname, Germany, where it is quite a rare surname, and Austria. Measured by absolute frequency, it is commonest in Germany, Switzerland, and the United States. Very seldom, הירט is the forename as well as the last name.