Son of the fair warrior
A modern American creative spelling of the Scottish surname McKinley. It derives from the Gaelic 'Mac Fhionnlaigh', meaning 'son of Finlay', where Finlay translates to 'fair warrior'.
Less common today
Mckinleigh isn't in the latest US Top 1000. It last peaked at #3,667 in 2018.
US births per 5-year period, 1990βpresent (SSA data).