It sounds like this was a different Rev. John Hamm, but just in case he had a son of the same name or changed his denominational affiliation I'll re-post this reference: http://www.heritagepursuit.com/Summit/SummitChapterXXVI.htm From a Summit Co. biography (Franklin Twp. was originally in Stark Co., which later became Summit): "Closely following the Methodist ministers in the pioneer days, were missionaries of the Reformed and Lutheran Churches, holding services in the German language. At that time, the differences between these two denominations were so slight that many families encouraged and supported ministers of both sects. It is said that Rev. John Hamm, a Reformed or German Presbyterian, first conducted services in a round log-house which stood on Phillip Hartong's farm, now owned by Jacob King. This building had formerly been used by Hartong as a residence, but when he built another cabin, his first rude home was donated for school and church purposes. Rev. Hamm lived at Manchester for many years, until he died some five years since. In the early days it was his custom to walk over from Manchester to this log building, accompanied by his wife ; he organized the Reformed Congregations in Green Township, both at Greensburg and East Liberty, and it is said those at Uniontown and Mud Brook. It is possible, however, that Rev. Wier, of the Lutheran, and Rev. Faust, of the Reformed Church, conducted services in Green Township, at private houses, before Rev. Hamm did, as they preached at Manchester before he appeared in this section of the State. " Richard B. Rev. John W. Hamm (1800-1872) is referred to in the Stark Co., OH, marriages as "German Presbyterian, VDM". Roger Rhoads