Surname 凯林 (凯林 
, Kaylynn 
, Kaelin 
) , in all the world, is quite a rare family name. The family name 凯林 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, it is the most numerous in the United States, China, and Switzerland. More frequently, 凯林 is the forename as well as the last name.