Last name Knal (Knal 
, Knall 
, كنال) , across the world, is a rare family name. The surname Knal is characteristic of Austria, where it is quite a rare surname, Germany, where it is a rare surname, and Romania. In absolute terms, it is commonest in Germany, the United States, and Austria. Much less frequently, Knal is the forename as well as the last name.