Son of Kenzie; fair one
A modern American spelling variant of the Scottish surname Mackenzie. It is derived from the Gaelic 'Mac Coinnich', meaning 'son of Coinneach', where Coinneach translates to 'fair' or 'handsome'.
Less common today
Mackinsey isn't in the latest US Top 1000. It last peaked at #7,592 in 2008.
US births per 5-year period, 1990βpresent (SSA data).