Family History and Genealogy Resources by Surname
McGowan Surname Origin(Origin Gaelic) From Gow, a smith; the son of a smith, Smithson. See Smith
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.
McGowan Surname Meaning and Family Facts
There is more to McGowan family history than the origin of your surname:
A McGowan Family History Thought:
What is past is prologue.