Pure
Kaytlen is a modern phonetic variant of Caitlin, the Irish form of Catherine. It ultimately derives from the Greek name Aikaterine, which is widely associated with the concept of purity.
Less common today
Kaytlen isn't in the latest US Top 1000. It last peaked at #7,533 in 1994.
US births per 5-year period, 1990βpresent (SSA data).