Pure
A modern phonetic spelling of Katie, which is a diminutive of Katherine. It ultimately derives from the Greek name Aikaterine, which has long been associated with the Greek word 'katharos', meaning pure.
Less common today
Kaytee isn't in the latest US Top 1000. It last peaked at #5,630 in 2000.
US births per 5-year period, 1990βpresent (SSA data).