I checked the early Licking Co sources I have at home.... *Licking Co OH Tax Index 1809: Nehemiah in Hanover Tp (p9) *Tax Index 1810: Nehemiah in Hanover & Licking Tps *Tax Index 1816: Nehemiah Range 12 Twp 2 p1 *Bristers History of Licking Co OH v1 p357: Nehemiah listed as early settler of Mary Ann Tp *Transcribed Marriages 1808-75 -p56 Nehemiah HARRIS + Sophia HIDER 7 Dec 1808 lic. dated William HAINS J.P. recorded 19 Dec 1808 -p58 John HARRIS + Cassander HUGHS 6 Mar 1817 George CALLAHAN EMED; Joseph HARRIS + Elizabeth SILARS 13 Feb 1817 T.D. BAIRD -p59 Hannah HARRIS + Paul EDMOND 15 Jul 1820 Thomas CARR M.G. -p62 Isaac HARRIS + Rachel HAAS 24 Nov 1825 P. SCHMUCKER -p63 John HARRIS + Hannah ODLE 16 Jan 1828 Elijah DURFEY J.P.
There are a lot of WILSONs in this area, but, I didn't find anything for Nehemiah in the following.... *Tax Indexes 1826, 1834 *Probate Records 1828-1904 *Cemeteries: Fallsbury, Perry, Eden, Hopewell Tps *Bristers v2 *Howe's History 1888 *Hill's History 1881 Index *Washington Co Early Marriages 1791-1803 *Marriages 1808-75, 75-79, 79-83, 83-88 *Pioneer Life in Licking Co *Memories of Old Newark *Pre-1808 Transcribed Land Records *Common Pleas 1819-22, Partitions 1831-36, Chancery Index 1819-24 *Newark Directory 1858/59 *Early County Home Index 1838-72 *Combined Atlas of Licking Co incl 1847 & 1854 Wallmaps & 1866 & 1875 Atlases
These are not exhaustive but they're what's printed. Have you contacted the Licking Co Genealogical Society? They do have a wonderful collection. Good luck.