The 1820 census record is one where I looked at the actual record.Here are households in order:. . . Richmond Hall, Jacob French, Henry French, Christian Shroyer, Peter Elliott, Anthony Bennett, David Howard, William Gill, William Coplan, . . . .
Re the Dayton area, I know very little.The obituary of a John D. Shroyer (who I believe is the brother of my Henry Shroyer) states he was born near Dayton in 1813.Henry Shroyer was born in Sullivan County in 1815.
I suspect that the father of Henry Shroyer and John D. Shroyer was born in Maryland.However, I'm not even sure of their father's name.It might have been Christian Shroyer; it might have been George Shroyer.