I am from David Yarnall (b. 24 March 1784), son of Jesse Yarnall (b. 1750, Chester Co, PA- d. before 1809 Cynthiana, KY) and Ann Tomlinson (b. 1755, Berks Co. PA). Their children were: John, Samuel, Isaac, Sally, Joseph, David. I have Jesse's parents as John Yarnall, Jr. (b. 18 Oct 1725) married to Sarah Ellis in 1749. There children were: Jesse, Rachel, Ann, Sarah. John Jr. was the son of John Sr. and Ann Coppock. John Sr. was the son of Francis Yarnall (b. in Worchestershire, England - d. 1721) and married to Hannah Baker 4 August 1686.
I hope this helps! Melinda