Ok, Here is the bad news. Ohio did not keep Birth or Death Records prior to 1868. I have some good news tho. In 1850 Ross County Census , Twin Township there is the following family: James Johnson 50,farmer ,borm Pa. , no wife listed,Mary 16 , Arrey 14 , John W. 12 , Suzana 10, Eliza 9, William 6 and Rener 4. All children listed born Ohio. I looked at Ross County marriages for James Johnson, found one in 1808 and one in 1844. Children ages don`t match marriage dates. I also looked Twin Township for Cemetery of wife who may have died around 1846 based on age of last child. No luck. Hope some of this helps.