There was a Finney family mentioned in newspapers in the Ohio County I am researching (Tuscarawas) and I remember reading about a Finney family that went to Egypt for missionary work. This is most likely, just a guess, that this family was connected to Reverend Thomas M. Finney who was the head of the Coshocton Presbetery and preached in Coshocton and Tuscarawas Counties and is descended from Thomas McKean. Thomas McKean, signer of Dec. of Independence Mothers name was Letitia Finney. This could the Finney line you seek. I hope this helps.