Family History and Genealogy Resources by Surname
McMahon Surname Origin
(origin Gaelic) The son of a bear; a hero.
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.
McMahon Surname Meaning and Family Facts
McMahon Last Name Meaning
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There is more to McMahon family history than the origin of your surname:
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A McMahon Family History Thought:
All of the flowers of all the tomorrows are in the seeds of today.