Pure
Katlyn is a modern American phonetic spelling of Caitlin. It ultimately derives from the Greek name Aikaterine, which the Romans associated with the Greek word 'katharos', meaning pure.
Less common today
Katlyn isn't in the latest US Top 1000. It last peaked at #223 in 1995.
American mixed martial artist
American stage and screen actress
US births per 5-year period, 1990βpresent (SSA data).