Slender or pure
Kaylia is a modern American invention, likely created as a blend of the popular prefix 'Kay-' and the melodic suffix '-lia'. It is often associated with the Irish name Kayley, meaning slender, or the name Katherine, meaning pure.
Less common today
Kaylia isn't in the latest US Top 1000. It last peaked at #2,957 in 1996.
US births per 5-year period, 1990βpresent (SSA data).