Spelling Variants
Kaitlin vs Kaitlyn: Which Spelling?
Kaitlin and Kaitlyn are anglicized variants of the Irish Caitlín.
Global Rank #312
Kaitlin
Origin: English (Modern)
Kaitlin is an anglicized variant of the Irish name Caitlín, derived from the Latin name Catharina, meaning "pure." The name has Gaelic linguistic roots and became popular in English-speaking countries…
Global Rank #350
Kaitlyn
Origin: English (Modern)
Kaitlyn is a modern English variant of the Irish name Caitlín, which derives from the Latin name Catilina and ultimately means "pure" (from Latin *castus*).
Which is more popular? Based on real registry rankings, Kaitlin currently ranks higher globally. Popularity can vary a lot by country — check each name's own page for a full regional breakdown.