This is my husband's family.I have the following: 1. Jacob Fulwiler. born ?, died 1830, Botetourt co., VA, wil Book G- page 448,married Catherine Nesley (Kneisely) daughter of Anthony Kneisley, Jr., born c. 1695, Switzerland, died 1777, Woodstock area, Shenandoah co., VA, married July 22, 1733, Trinity Lutheran Church, Lancaster Co., VA to ann Barbara Doerr.He was the son of Anthony Kneisley, Sr. born August 20, 1657 in Eggiwil, Switzerland, died May 14, 1733, Lancaster co., PA.He was a Menonite.the family moved from Switzerland to Germany and departed from Rotterdam to Lancaster, PA 2. John fulwiler, probably a brother to your Catherine, named for her mother,born ?, died in Botetourt Co., VA, married Catherine Beeher, etc.
Hope this helps you to make a connection. I don't know the parents of Jacob Fulwiler.