The name was spelled both ways in the census reports.The 1850 TN Census lists the family as William DARVIN.He died before the 1860 census, but there,his wife, Mary was listed as DARWIN. Her name and those of her children were the same on both reports, as were their year of birthand the county where they lived. There can be no doubt, they are the same people. I have a death certificate for Parresitter DARWIN Taylor, d/o of Mary. The correct spelling is DARWIN. I appreciate your help.