Family History and Genealogy Resources by Surname
Whitman Surname Origin
From wight, in old English, lively, quick, and man, or from the Dutch, wight, weighty, ponderous, Wightman, a stout man, or it may be, after all, simply White-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.
Whitman Surname Meaning and Family Facts
There is more to Whitman family history than the origin of your surname:
A Whitman 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