Pure
Kateline is a rare medieval variant of Katherine. It shares the same etymological roots as the Greek name Aikaterine, which has long been associated with the concept of purity.
Less common today
Kateline isn't in the latest US Top 1000. It last peaked at #7,459 in 1995.
14th-century French noblewoman
US births per 5-year period, 1990βpresent (SSA data).