Working on an unsourced profile from Ohio, I found the ancestor Johann Friedrich Daniel August Erdmann who married Anna Christina Andersen in Copenhagen, Denmark. I'm completely unfamiliar with the Danish language or the history and geography of Denmark.
So, if anyone would like to take on the Erdmanns and Andersens whose sons removed to Ohio, you're more than welcome to. (There is a possibility that the family moved to Prussia/Germany later on since one of the sons' wives is likely from Germany).
Thanks!