Modern invented name, likely a combination of Kai and Paisley.
Kaizley is a contemporary American creation without a single historical root. It likely blends the Hawaiian name Kai, meaning 'sea', with the Scottish surname Paisley, or follows the popular phonetic trend of adding a '-ley' suffix to sharp, modern sounds.
Less common today
Kaizley isn't in the latest US Top 1000. It last peaked at #3,926 in 2021.
US births per 5-year period, 1990βpresent (SSA data).