Caelin

Caelin is a feminine name with Celtic and Gaelic origins, though it's used for both genders in some regions. The name derives from elements meaning 'slender' and 'fair' or 'pure,' creating associations with beauty and grace. Some interpretations connect it to the Old Irish 'caol' (slender) combined with a diminutive suffix. Caelin shares linguistic roots with names like Caelan, Kaelin, and Kaylin, which feature various spelling variations. The name gained modest popularity in English-speaking countries during the late 20th century as part of the trend toward Celtic-inspired names. Its melodic quality and ancient heritage appeal to parents seeking a name with historical depth yet a contemporary sound.

Caelin is also given to boys, where it ranks #12345 in the US.

Pronounced KAY-lin.

As of October 2026, Caelin ranked #12345 in US births in 2025 SSA, peaked at #3364 in 1997.