I tried Archives.com but did not get any additional information. Most of the other graves that you provided don't seem to be related to me. However, there are some families about which I know very little. Peter A. Ries might possibly be the grandson of the brother of my great great grandfather. The date for his father roughly lines up with what little I know. There are clans named Ries in Iowa that I am not related to so they could belong to them.