Is it possible that your John B. Lehman was the son of Hans Jacob Lehmann, b. 12 Jul 1711 in Blankenloch, Germany and Anna Magdalena Henperlin, b. 15 Sep 1723 in Blankenloch. They had a son Jochim Lorentz Lehman, b. 29 Aug 1742 in Blankenloch who married Sarah Grooms. They had children born in York, Adams and lastly Bedford counties, PA. Most of this family headed on to West Virginia and then to Kentucky and changed their spelling to Layman. You might try Blankenloch records for your John B.s birth. Don