Thanks for your time and effort. As well as I can learn, William Yearly Davis was the only child of Delany/Dulana ? and her first husband ? Davis. A "'Biographical Review of Johnson, Massac, Pope and Hardin Counties, IL" says that he was born in Johnson (Johnston?) Co NC, and according to the calculations of age at time of death, birth was 10 Feb 1804. When he was one year old the family moved to AL where his father died not long after. His mother remarried and they lived in middle TN for about 14 years. LDS records show Archabal Goodman and Delany Davis were married in Williamson Co, TN in 1806 which would pretty well match the other info. I don't know if there was any other Davis' that moved to AL or TN with them. In any case, Archibald Goodman was in what is now Williamson Co, IL in 1820 census. Since I don't even know the father's name, I am not sure if the other Davis names would help any. The only thing would be if they matched any of his children's names. If it is not too much trouble you might send the names of the other Davis families.
Thanks for your help.