Pure, clear, or vigilant
Cacie is a modern spelling variant of Casey or Cassie. It is often used as a diminutive of Catherine, meaning 'pure', or derived from the Irish surname O Cathasaigh, meaning 'vigilant' or 'watchful'.
Less common today
Cacie isn't in the latest US Top 1000. It last peaked at #9,707 in 1998.
US births per 5-year period, 1990βpresent (SSA data).