Family History and Genealogy Resources by Surname
Kennan Surname Origin
Gaelic, Ceanann or Ceanfhionn, white-headed, bald.
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.
Kennan Surname Meaning and Family Facts
There is more to Kennan family history than the origin of your surname:
A Kennan Family History Thought:
Whenever there's a will, you'll see an heir loom.