Caithlin

Caithlin is a feminine name representing an Anglicized form of the Irish name Caitlín (pronounced 'Kath-leen'), which itself is an Irish form of Katherine. The name ultimately derives from the Greek 'Aikaterine,' whose meaning remains debated but may relate to 'pure' or 'each of the two.' Despite its authentic Irish roots, this spelling variant is relatively uncommon compared to the more popular forms Caitlin, Kaitlyn, or Kathleen. Caithlin maintains the traditional Irish pronunciation while offering a distinctive spelling. The name carries associations with Irish heritage and culture, making it appealing to families with Celtic connections who seek a name that honors their ancestry while remaining accessible.

Pronounced KATH-lin.

As of October 2026, Caithlin ranked #12003 in US births in 1994 SSA, peaked at #9376 in 1988.