Cognomen קלאסי (Clasie 
, קלאסי 
) , all over the world, is a very rare last name. The surname קלאסי is habitual in Netherlands, where it is a rare surname, Australia, where it is a very rare surname, and Israel. Measured by absolute frequency, it is commonest in Netherlands, Australia, and the United States. More frequently, קלאסי is the forename as well as the last name.