Here's what I know:Mary Michael and Jacob DeVault had two children:a son, Abraham DeVault (b. 14 April 1791 in "Old Virginia"; d. 29 April 1863 in the Clinton District, Monongalia County, WV); and a daughter, Phoebe DeVault (b. 11 March 1797; d. 20 July 1877).
Abraham(my 5th-G'Grandfather)married Mary Steele (b. 14 April 1795; d. 2 January 1889) on 14 March 1819.They had 9 children).Abraham served as a Private in Captain James Morgan's Company in 1813, Monongalia Co., WV.Later, he served as a delegate at the Western Convention (1861) regarding the secession of WV from VA in response to VA's decision to secede from the Union.WV was granted full statehood just two months after Abraham's death (so sad!He didn't live to see it!).
Phoebe married David Hayhurst, Jr. (23 September 1794; d. 1 August 1865) on 20 February 1817.They had 13 children. They were married in Monongalia Co., VA (now WV).
I have a lot more information, which I'm happy to share, on their descendants, but little to nothing on their ancestors.Perhaps we can swap notes as our research progresses?I would LOVE to find more information about Jacob and Mary!