Slender or pure
Caely is a modern American coinage, likely a phonetic blend of the Irish name Kayley, meaning slender, and the Greek-derived Catherine, meaning pure. It follows the popular trend of 'ae' spellings and 'ly' endings that emerged in the late 20th century.
Less common today
Caely isn't in the latest US Top 1000. It last peaked at #11,732 in 2022.
US births per 5-year period, 1990βpresent (SSA data).