Mac Aileáin
Mac AILEÁIN—IV—M'Elean, M'Elane, M'Ilean, M'Ellen, M'Kilan, MacAlean, MacClean, MacLean, MacKellan, MacKellen, MacKillen, etc.; 'son of Aileán'; a variant of Mac Ailín, which see; a scattered surname in Ulster and Connacht. The following entry in the Fiants of Elizabeth throws some light on its origin: A.D. 1602—Pardon to Elin M'Elane, kern, (in Co. Armagh). The family is probably an offshoot of the MacDonnells or Campbells. See also Mac Coileáin and Mac Coilín.
Alphabetical Index to Irish Surnames