Family History and Genealogy Resources by Surname
Trainor Surname Origin
(Origin Gaelic) Treunmhor, very brave; Treun, Gaelic, brave, valiant; er or or, the termination of fear, a man.
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.
Trainor Surname Meaning and Family Facts
There is more to Trainor family history than the origin of your surname:
A Trainor Family History Thought:
'Those who forget their past are destined to repeat it.' --Robert A. Heinlein