Family History and Genealogy Resources by Surname
McMurrough Surname Origin
The son of Murrough or Murrach; Mor, great, strong, and ach, battle. Mur, a wall, bulwark, and ach.
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.
McMurrough Surname Meaning and Family Facts
There is more to McMurrough family history than the origin of your surname:
A McMurrough Family History Thought:
'The past isn't dead. It isn't even past.' --William Faulkner