Pure
Keitlyn is a modern phonetic spelling variant of Caitlin. It ultimately derives from the Old French name Cateline, which is the French form of Katherine, rooted in the Greek word katharos.
Less common today
Keitlyn isn't in the latest US Top 1000. It last peaked at #8,254 in 2024.
US births per 5-year period, 1990–present (SSA data).
