Son of the fair one
A modern American spelling variation of the Scottish surname Mackenzie. It is derived from the Gaelic name MacCoinnich, meaning 'son of Coinneach', where Coinneach translates to 'fair' or 'handsome'.
Less common today
Mckinzy isn't in the latest US Top 1000. It last peaked at #8,341 in 2008.
US births per 5-year period, 1990βpresent (SSA data).