My grandfather was also the son of John Calvin Coffman who was the son of Henry H. Coffman b)July19, 1821 in Indiana. Info I have found shows Henry to be the son of Jacob Coffman b)Feb 17, 1788 and Nancy Earp. Jacob was the son of Abraham Coffman b)June 1, 1763 and Ann Thursby. Abraham was the son of Jacob Coffman and the only info I have is he died before 1791. His will was handled in a court case in Hardy Co., VA on Mar 8, 1791.I would be glad to share additional info.