I'm researching my Risewick family and along the way have started to gather notes on the variations Reiswig/ Reusswig/ and recently Reisbig.
I could search through my various census resources and obituaries for information for you if you can provide a more detailed family listing, (ie birthdates and places/ death dates and places) for the known family members known to have come to the U.S. What was the date of immigration, and where did the family first settle?
I have a number of bits and pieces that might be of interest. My immigrant was Johannes Reusswig who came to Pennsylvania in 1742. The Reusswig name is very centralized in the Niedermittlau/ Neuenhasslau area of Hessen, Germany. I have been told by a German researcher that many of the Reusswig's also took the Reisbig or Reussing or Reising spelling of the name. This doesn't mean all Reisbig's originate from Reusswig but it certainly is a good lead to follow. This same German researcher has sent me extracted church records for Niedermittlau for the 1700's with Reusswig (and variant) families.
I also have Reiswig/ Reisbig extractions from the 1798 census for Volga, Russia that a researcher sent me from Brent Mai's book.
I belong to a Reiswig research group that has over 60 Reiswig researchers. If you would be interested in joining, let me know and I will send you the details. At our research group I have text files with the census and church extractions that I mentioned above.
You can also visit my website at (this is not the research group, but does give a good starting place for information on the Reiswig surname).http://www.geocities.com/deenecer