Pure; slender
Kayline is a modern American invention, likely created by combining the name Kay with the popular suffix -line. It draws its meaning from the Greek 'katharos' via Kay, and shares the delicate, rhythmic quality of names like Adeline or Caroline.
Less common today
Kayline isn't in the latest US Top 1000. It last peaked at #11,070 in 2006.
US births per 5-year period, 1990βpresent (SSA data).