If you haven't already done so, check the Beers 1897 history of Wood County; there is a lengthy biography of John W. Clemens, and it mentions his parents, and gives fairly detailed information about the various places they lived. It also says they were 70 and 72 years old when they died, and they are buried in the Mt. Zion Church cemetery. The names of the children are not given, except for those who had died- Charles died in infancy, and of those who lived to maturity, Jacob, Charles, and Delilah were deceased. The article also says that Daniel came from western Pennsylvania to Seneca County, Ohio, where he married Hannah Kizer. Hope this is helpful to you!