Family name 喀斯 (Kas 
, 喀斯 
) , all over the world, is a common cognomen. The cognomen 喀斯 is characteristic of Curacao, where it is quite a common surname, Lithuania, where it is quite a rare surname, and Brunei. Not in comparison with a country's population, this name is the most popular in Turkey, Indonesia, and Saudi Arabia. Also, 喀斯 is the forename as well as the last name.