Hello, my family has also been lead to believe that we are related to the general. Apparently a great aunt had the family tree traced and found a connection. My own research has revealed that he had no direct descendents. His only surviving son and daughter never married. He did , however, have ten brothers and sisters though he was not raised with them. After the death of his father, Charles, he was taken to be raised by the Thomas Ewing family. If you can find ties to one of the Shermans of Ohio then you'll probably be closer to solving the puzzle. Good luck!