I am afraid that the information I have is very common as I am looking for a John Crawford and Mary Crawford but maybe some one knows.
What I have uncovered is that John Crawford immigrated from Ireland to Ohio. He had a Daughter Mary in 1825 in Ohio, who later married Edmund Marshall of Pennsylvania and they moved to Bad Axe, Wisconsin. That would make it likely that he was born around 1780 to 1805 in Ireland.
If it helps, Edmund Marshall was the son of Lazarus Marshall of Pennsylvania but I don't have anymore on him either.