I am not certain I am connected to your Fulwiler Families but MAYBE this information will help you.
My GreatGrandmother Cora Belinda Handwork Skinner left me a lot of valuable genealogy information.However, she spelled the family name Fulwyler.I have been able (thanks to all her help) to go back to Casper Follweiler b. abt. 1700 in Switzerland.Casper was married to an Anna Maria Will b. abt. 1700-1710.They had a son named Bernhardt Folweiler b. abt. 1735 to 1745 in Switzerland .He married an Elizabeth b. abt. 1735. Their son Ferdinand Fulwyler was born 17 Feb. 1765 in Lynn Two., Lehigh Co., PA and d. 1 Apr. 1844.His wife was ???? b. 11 Aug. 1767 d. 18 Oct. 1838 Lynn Twp., Lehigh Co., PA.They had a son named Ferdinand, b. 14 Feb. 1799 in Lynn Twp., Lehigh Co., PA m. Eva Lynn b. 15 Aug. 1805 in Berks Co., PA d. 26 Ppr. 1846 Canfield, OH.He died 20 Oct. 1872 in Canfield, OH. Eva and Ferdinand had a daughter named Lydia Ann Lynn who married my Gr-Gr-Grandfather, Samuel Henry Handwork.They both lived and farmed in Wells Co., IN and died there and are buried nearby in Huntington, IN
The Fulweilers had a hand in saving the Liberty Bell...lots of them were in Lehigh Co., PA.You may want to do an inter-library loan on microfilm of the book (three volumes on the film) the History of Lehigh County, PA written by Charles Rhoads Roberts, Rev. John Baer Stoudt, Thomas H. Krick and William J. Dietrich.I think you'll find it very interesting.
If you have any questions please feel free to contact me at ASmallCalim@aol.com....in the subject line please write "Fulwiler".I am trying not to open e-mails unless I know who they are from these days because of all the virus'.