Mac Giolla Adhamhnáin
Mac GIOLLA ADHAMHNÁIN—IV—M'Eleownane, M'Eleownan, MacAlonan, MacLennan, MacLennon; 'son of Giolla Adhamhnáin' (servant of Adamnan); a Co. Down surname; also a Scottish surname, said to be the origin of Mac Lennan of Rosshire.
Alphabetical Index to Irish Surnames