Last name Кейтлін (Caitlyn 
, Кейтлін 
) , worldwide, is a rare family name. The surname Кейтлін is characteristic of Singapore, where it is a rare surname, Australia, where it is a very rare surname, and Indonesia. Measured by absolute frequency, this name is the most popular in Indonesia, the United States, and Australia. Much more frequently, Кейтлін is the forename as well as the last name.