I have an idea your Daniel and Rebecca Poorman may be related.
Taken from the History of Clinton Co., Iowa 1879
J.H.Tong was born in Fairfield Co., Ohio in 1820. He married Rebecca Poorman there in 1843. The family moved to Clinton Co., Iowa. You can get more info on their family if you look at my 6/21/2005 posting to the Tong Forum.