A 1916 History of Lorain County, gives the following information under the heading " South Amherst Churches".
"To satisfy the desire and longing of numbers of German families to attend services conducted in their own language, St, John's Evangelical Church was erected in 1901 in the southwestern part of the village. The land on which it was built was donated for the purpose by Mr. George Ludwig".
"The three churches of the town, as existing today (1916) are each characterized by some individuality. St. John's is essentially a German church. The strength of the Methodist church is largely due to the support of the English people, who comprise a substantial part of the community. The Congregational church represents the remnant and survival of the old conditions and although not a flourishing church, it is maintained by a failtful few".
My belief is that St. Johns church was located at the corner of State Route 113 and Quarry Road in South Amherst. The land at this location was owned by George Ludwig in 1900. There is an old church on that corner, but it has changed hands several times, I believe, and is no longer St. Johns church. I don't recall a cemetery on the church grounds, but I may be mistaken.
You are correct that several Bartlome families still reside in the area. In fact, I have a family member who is friends with a Bartlome who is about 80 years old. I may be able to pose your question to him. Who knows, he may have some knowledge of Rudolph. I can't promise anything however.