Meaning and name origin
Cailin \ca(i)-lin\ as a girl's name (also used as boy's name Cailin), is pronounced KAY-lin. It is of Gaelic origin, and the meaning of Cailin is "girl". Possibly a contemporary variant of Cailean (Scottish). See also Kaylin.
For more information, see also the related girl name Colleen.
Cailin is not a popular first name for females and an equally uncommon surname or last name for all people (Source: 2000 U.S. Population Census).
Displayed below is the baby name popularity of the name Cailin for girls. Cailin reached its highest rank of #85 in Canada in 2000 (Source: 2014 Birth Name Statistics).
Displayed below is a comparison of the popularity of the girl name Cailin and its variant forms. Popular variation forms ranked in the Top 1000/100 are Kaylin (#547), Colleen, Cailyn and Cailin. (Source: 2014 Birth Name Statistics).
Cailin is also pronounced similarly to Caelin, Cailen, Cailene, Cailynn, Calen, Calin, Callan, Callen, Calyn, Caoilinn, Cauline, Cayelin, Caylen, Caylyn, Kaelin, Kailan, Kailin, Kailyn▲ and Kalin. Other suggested similar baby names are Cailie, Caitlin▼, Calina, Carlin, Catlin and Ciline. These names tend to be more commonly used than Cailin.