Family History and Genealogy Resources by Surname
Van Dam Surname Origin
(Locality). From the town of Dam, in Holland, which signifies a mole or bank to prevent inundations, and where towns were frequently built, as Amsterdam (Amstel-dam), Rotterdam.
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.
Van Dam Surname Meaning and Family Facts
There is more to Van Dam family history than the origin of your surname:
A Van Dam Family History Thought:
'If you would not be forgotten,
As soon as you are dead and rotten,
Either write things worthy of reading,
Or do things worthy of writing.' --Benjamin Franklin, May 1738