A death certificate for a potential relative indicated he died in "tumway, Iowa." I had no idea where that was. I didn't try the United States Geological Survey Geographic Names Information Site it, but it wouldn't have made any difference anyway.
Googling "tumway iowa" told me that it wasn't probably "tumway" at all. A search for "tumway iowa" resulted in references to Ottumwa, Iowa. I should have thought of that. If the gazeteers don't bring the desired results, try Google.