I suspect that your SWINT family are of the northern branch of SWINTs.Mine are from the southern branch, all of whom came from John SWINT who d. 1801 in Hancock County, GA, and his seven sons:John, Edmund, (Rev.) Frederic, James, William, Joseph, and Samuel.
The book SWINT by Mildred EZELL, concentrates on these southern families.However, there is a little info that might give you a starting point.
SWINT does mention that there is at least one published history of the Pennsylvania SWINT family and it "stated that the seat of the Swint family was from near Mainz in the province of Hessen, which is the province immediately north of Baden-Wurtemberg."I haven't seen any of the northern SWINT publications, nor do I know any titles to give you.
There were apparently no SWINTs or alternative spellings in New Jersey, but there were some (varied spellings) in New York and Pennsylvania.I have seen, I believe, 26 different spellings of this short name, some quite creative, I thought.
As far as I know there were no SWINTs before 1850 in New York.In the 1850 census index there some in Kings Co (SCHWIND), in Delaware Co (SWINT), in Onadara Co (SWINT), and three spellings in NYC (SCHWINT, SCHWENTZ, SWINTZ)
Philadelphia County - 1840 - SWENT; 1850 - SCHWENTZ,SWINT (2)
Chester County - 1850 - SCHWENT
Schuylkill County - 1850 - SCHWENT
Indiana County - 1850 - SWENTZ
Somerset County - 1850 - SWINT
Westmoreland County - 1850 -SWINT
I know none of these are in the time span you're looking for, but it gives you a sense of where some of the northern SWINT family were living at one time, and yours may well have been descendants of some of those.There were a few Lewis SWINTs in the southern branch, but as far as I can tell they all lived and died in the south.
You might also try going to the usgenweb archives search page at http://www.rootsweb.com/~usgenweb/ussearch.htmhttp://www.rootsweb.com/~usgenweb/ussearch.htm and search these states using the various spellings shown.Use all lower case letters.I've had some great finds there.Hope something here helps!Good luck!