Slender and fair
Derived from the Irish Gaelic elements 'caol' meaning slender and 'fionn' meaning fair, white, or pure. It is the name of an early Irish saint known for her piety and kindness. The name embodies a traditional Celtic aesthetic of grace and light.
Fewer than 5 girls were named Caoilainn in 2025.
US births per 5-year period, 1990–present (SSA data).
6th-century Irish saint associated with the Roscommon area
