Family History and Genealogy Resources by Surname
Stewart Surname Origin
Walter, the son of Fleance, and grand-son of Banquo, was created, by Malcom III. Lord High Steward of Scotland, from which office his family afterward took and retained the name of Stewart, and from them descended the royal family of Stuart.
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.
Stewart Surname Meaning and Family Facts
There is more to Stewart family history than the origin of your surname:
A Stewart Family History Thought:
'The past isn't dead. It isn't even past.' --William Faulkner