Pure
A modern phonetic spelling of Caitlin, which is the Irish form of Catherine. It ultimately derives from the Greek name Aikaterine, which has long been associated with the concept of purity.
Less common today
Kaetlyn isn't in the latest US Top 1000. It last peaked at #2,355 in 1997.
Olympic gold medalist figure skater
US births per 5-year period, 1990βpresent (SSA data).