1. English: habitational name from Mackley in Derbyshire, which may have been named in Old English as ‘Macca's forest’, from an unattested personal name + lēah ‘woodland clearing’, ‘glade’.
2. Scottish: Anglicized form of Gaelic Mac Donnshleibhe ‘son of Donnshleibhe’, a personal name literally meaning ‘brown hill’.
3. Probably also an Americanized form of German Mä(g)gli (see Magley).
See the Key to the Dictionary or consult the General Introduction for further explanation.