Girl name · Irish
Caitlin
“pure”
Vibes
Common nicknames
Short-forms and diminutives parents often use for Caitlin.
Explore Caitlin further
Similar-feel alternatives, or middle-name candidates that pair well with Caitlin — both ranked by the same scoring system (vibe overlap, syllable rhythm, origin compatibility).
About the name
Caitlin is the Irish form of Catherine, which reached Ireland through Norman French Cateline. The underlying Greek Aikaterine has no secure etymology; the pure reading comes from a later association with katharos, clean, that is probably folk etymology but is now universal.
In Irish it is said KOYT-leen, and the American KATE-lin pronunciation is a misreading that then spawned Katelyn, Kaitlyn and a dozen more spellings. It peaked in the US in the 1990s and has fallen steeply since.
Kate is the escape hatch and a full name of its own. Two syllables want two or three (Caitlin Maeve, Caitlin Josephine). On our vibe map it is Y2K Nostalgic, which is simply where its peak decade puts it.
More Irish names
Caitlin sits in our Irish set — these share its roots.
All Irish names →Caitlin — common questions
Is Caitlin a boy or girl name?
Caitlin is traditionally a girl name of Irish origin.
What does the name Caitlin mean?
Caitlin means “pure” of Irish origin. Caitlin is the Irish form of Catherine, which reached Ireland through Norman French Cateline. The underlying Greek Aikaterine has no secure etymology; the pure reading comes from a later association with katharos, clean, that is probably folk etymology but is now universal.
Where does the name Caitlin come from?
Caitlin is Irish in origin. In Irish it is said KOYT-leen, and the American KATE-lin pronunciation is a misreading that then spawned Katelyn, Kaitlyn and a dozen more spellings. It peaked in the US in the 1990s and has fallen steeply since.
What are common nicknames for Caitlin?
Cait, Kate, and Lin — the short-forms parents most often use for Caitlin.
How popular is Caitlin?
Caitlin did not make the top 1,000 girls' names in US Social Security Administration data for 2025, which makes it genuinely rare in the US.
Bring the name into the room
A couple of nice things named Caitlin you might want for the nursery.