A 1912 Fayette County, Pennsylvania, history names the children of William and Priscilla Gaddis as Thomas, John, Robert, Henry and Anna who married Levi Springer.28 The four alleged sons and Levi Springer owned contiguous parcels of land in North Union and Menallen townships in Fayette County.29
Thomas’s Revolutionary War pension application indicates he was born in Frederick County, Virginia, on 28 December 1742.30 Both Robert Gaddis and Levi Springer also left records in Frederick or Hampshire counties prior to moving to Pennsylvania31 Virginia military records note that a William Gaddis served in the Revolution and died in 1777 “while in the service of the United States and left no legitimate issue, but left a brother John Gaddes the oldest brother and heir at law of the said William Gattis.”32
Another probable son of William and Priscilla Gaddis was Rees Gaddis who in 1767 witnessed a Quaker wedding along with John Gaddis and in 1771 witnessed another Quaker wedding with William Gaddis, Sarah Gaddis and John Gaddis.33
https://www.virginiaancestry.com/Cunningham%20Family%20Record%20and%20parentage%20of%20Ruth.pdf
