Son of Kenneth; born of fire
A modern American spelling variation of the Scottish surname McKenna. It ultimately derives from the Gaelic Mac Cionaodha, which signifies descent from Cionaodh, a name meaning 'born of fire'.
Less common today
Mckenah isn't in the latest US Top 1000. It last peaked at #12,826 in 2000.
US births per 5-year period, 1990βpresent (SSA data).