I was puzzling over the Jannat Custard and then suddenly I remembered! It wasn't Joseph Covert who married Jane Custer but George Brokaw who married Jane Custer and had a son John(?) Brokaw who married a Covert? Perhaps Sarah?
Because, I know that John(?) Brokaw and Morris (?) Covert were buddies from the War of 1812, founded New Athens together, and, somehow became related--of course, since they were two guys, it had to be somebody's sister or something.
So Joseph Covert really COULD have fought in the American Revolution alongside his son!