One of the decendents of Peter Dumm and Maria Drum was Henry John Dumm B 4 Jun 1794 in Berks County, PA. Henry and his wife Sarah Culp farmed in Ross County all thier lives and had a child by the name of Samuel Dumm. After the death of Henry in 1837, Sarah went to Indiana with son Samuel. Also going to Indiana at that time was John Dumm and wife Sarah McCabe.
Hope this gives you some help.
Also posted in PAF decendents of Peter Dumm by a Linda Herrnstein was the name of John H. Dumm, B: 1853 in Ohio the son of Eli Dumm and Eliza Shriver but I am not sure if this is right. My G-G-grandfather was Eli Dumm and I only showed one child, Christian Lewis but thier could have been more!!