Caoilinn is a name of Irish origin, often used for girls. It is derived from the Gaelic word "caol," meaning "slender" or "narrow." The name is sometimes associated with beauty and grace, reflecting its meaning. In Irish culture, names like Caoilinn are often linked to historical figures or folklore. The name may also be spelled as Caolinn or Kailin, showcasing its variations. It is a relatively uncommon name outside of Ireland, making it unique for those who bear it.