According to info I copied, but do not have original records to prove:
John died 1846 in Ohio & was mg to Catherine Brendel on 22 Mar 1795 in Hagerstown, Washington Co, Md.
Jacob is also listed as Preblo, Ohio
Lydia Earhart who mg John Frederick is listed as LaRue, Marion Co, Ohio
I don't have any of the children of John, Jacob or Lydia.
Hope we are the researching the same Philip & Mary Earhart, because I have a lot of gaps in my research. I don't have access to many Va or Md records.