Family name كاس (Kas 
, Cass 
, Cas ) , across the world, is a common surname. The family name كاس is habitual in Slovenia, where it is quite a common surname, Curacao, and Belize. Measured by absolute frequency, this name is the most popular in the United States, Philippines, and the United Kingdom. Likewise, كاس is the forename as well as the last name.