Family History and Genealogy Resources by Surname
McIldoey Surname Origin
From Mac, son, gille, a youth, and dhu, black; the son of the black youth.
Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import; Arthur, William, M.A.; New York, NY: Sheldon, Blake, Bleeker & CO., 1857.
McIldoey Surname Meaning and Family Facts
There is more to McIldoey family history than the origin of your surname:
A McIldoey Family History Thought:
'We are all omnibuses in which our ancestors ride, and every now and then one of them sticks his head out and embarrasses us.' --Oliver Wendell Homes