Caitlin \ca(it)-lin\ as a girl's name is pronounced KATE-lin, kat-LEEN, KOIT-leen, KATH-leen. It is of Old French and Greek origin, and the meaning of Caitlin is "pure". Caitl?is the Irish Gaelic form of Cateline, which is the Old French form of Katherine, whose source is the Greek name Aikaterine. See also Catherine.
Caitlin has 53 variant forms: Caelin, Caelyn, Caetlin, Cailen, Cailene, Cailyn, Cailynn, Cait, Caiti, Caitie, Caitilin, Caitlan, Caitland, Caitlandt, Caitlann, Caitlen, Caitlinn, Caitlyn, Caitlyne, Caitlynn, Caitrin, Caity, Calen, Calin, Calyn, Calynn, Catelan, Cateline, Catelinn, Catelyn, Catelynn, Catlain, Catlin, Catline, Catlyn, Catlynn, Catriona, Cayelin, Caylen, Caylin, Caylyn, Kaitlan, Kaitlann, Kaitlin, Kaitlinn, Kaitlyn, Kaitlynn, Katelan, Katelin, Katelyn, Katelynn, Kayelin and Kayelyn.