Caitlin is of Irish origin, derived from the ancient Gaelic name "Caitlín," which was a diminutive form of "Caoimhín." This name means "pure" or "gentle," reflecting its association with innocence and sweetness. Caitlin is typically pronounced as /kə'tlɪn/ in English, with the stress on the second syllable. It has gained significant popularity worldwide, particularly in English-speaking countries like the United States, Canada, Australia, and the United Kingdom.
"The name Caitlin experienced fluctuations in popularity during these years, with peaks in 1987 and 1990, and then a decline in 1993."