Family name 凱林 (Kaelin 
, 凱林) , throughout the world, is quite a rare cognomen. The cognomen 凱林 is characteristic of Western Europe, particularly Liechtenstein, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Austria, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in the United States, Switzerland, and France. Very seldom, 凱林 is the forename as well as the last name.