Pure
A modern phonetic variation of Caitlin, which is the Irish form of Katherine. It ultimately derives from the Greek name Aikaterine, which has long been associated with the concept of purity.
Less common today
Kaithlyn isn't in the latest US Top 1000. It last peaked at #5,591 in 2002.
US births per 5-year period, 1990–present (SSA data).
