The whitepages.com site allows you to see a geographic distribution of individuals with a particular name within the United States. When I googled myself (Images, specifically), the first hit was from http://names.whitepages.com/Kansas/Robert/Rohr and contained the following image:
I know of another Robert Rohr in Vermont who is a retired attorney with links to Margot's law firm. I think that's about all of the Rob Rohr that people around here can handle.