Family History and Genealogy Resources by Surname
Seton Surname Origin
(Locality). From lands of that name in Haddingtonshire, Scotland, which were so called because the town thereof was situated close upon the sea, and which gave name to the family of Seton, so renowned in Scottish annals.
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.
Seton Surname Meaning and Family Facts
There is more to Seton family history than the origin of your surname:
A Seton Family History Thought:
'The only thing new in the world is the history you don't know.' --Harry S. Truman