Son of McKinley or learned meadow
Makenley is a modern American invention, likely created by blending the prefix 'Ma' with the surname McKinley. It may also be interpreted as a variant of McKinley, which is derived from the Gaelic 'Mac Fhionnlaigh', meaning 'son of the white warrior' or 'learned one of the meadow'.
Less common today
Makenley isn't in the latest US Top 1000. It last peaked at #5,403 in 2010.
US births per 5-year period, 1990βpresent (SSA data).