Mr. Merritt was born in 1816. He came to the Delaware Town area when he was about 34 years old. His wife was the former Nancy Ragsdale (1814-1883). This couple and their 6 children all came from TN. It would seem likely that Nathaniel would have had been of some relation to Joseph Merritt who was young enough to be Nathaniels child?
“NATHANIEL MERRITT,” I Remember When : Wayne Glenn, accessed March 23, 2019, http://i-rememberwhen.com/items/show/652.