Pure
Kately is a modern American invention, likely created as a phonetic blend of Kate and the popular 'ly' suffix, or as a diminutive of Caitlin. It shares the etymological roots of Katherine, which is derived from the Greek word 'katharos' meaning pure.
Less common today
Kately isn't in the latest US Top 1000. It last peaked at #9,238 in 2005.
US births per 5-year period, 1990βpresent (SSA data).