Family History and Genealogy Resources by Surname
McIntosh Surname Origin
(Origin Scottish) The son of the leader or first. Tosh, and Toshich, signify the beginning or first part of any thing; so Toshich came to denote the general or leader of the van. The McIntoshes derive themselves from McDuff, who obtained his right from Malcom Canmore.
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.
McIntosh Surname Meaning and Family Facts
There is more to McIntosh family history than the origin of your surname:
A McIntosh Family History Thought:
'I don't know who my grandfather was; I am much more concerned to know what his grandson will be.' --Abraham Lincoln