I have been researching a cluster of DNA matches to my mother and have several shared matches who are descended from Samuel and Amelia Rinehart of Pennsylvania/Ohio (through their children John, Barnet, and Joseph). These DNA matches also match descendants of David Potts (Potts-136), born ~1700. For the ones on DNA sites with a chromosome browser available, they all match on the same segment of Chr 3 (matches in the 20-60 cM range or so), suggesting a shared common ancestor. Samuel's paternal line is documented, so I suspect that the connection is either through his wife Amelia or his mother Sarah, or possibly his paternal grandmother. So far I haven't found any matches in this cluster descended from siblings or cousins of Samuel, so it seems that Amelia is the most likely option. She could be the granddaughter or great granddaughter of David Potts through one of his ~12 children. However, so far there's no paper trail to back up that hypothesis.
Based on geography and my existing tree, I think my own connection to David Potts is not through the Rineharts so I'm going to be focusing elsewhere right now, but I wanted to put the information out there so that other interested researchers can pursue it if they want to, and potentially connect Amelia to her family. (I've also posted this as a comment on Amelia's profile page.)