Marge, I have just a little in my files for Isaac and Jerusha Ward, and as you say, they married on November 08, 1770 in Ashfield Massachusetts. I do not have anything further for these, but Isaac was the son Charles Chauncey and Sarah Ingram. Charles was the son of Isaac Chauncey, Rev., and Sarah Blackleach. This Isaac was the son of Israel Chauncey, Rev., and Mary Nichols, who was the son of Charles Chauncy and Catharine Eyre.
I believe this to be correct, but do not have any documentation to prove it. I have been able to put some of the Chaunceys in order from the Memorials of the Chaunceys however.
If you have use for more info for Isaac's ancestors, I can email you a report. If you have data for Isaac and family in Ohio, I would like to have that for my files as well.