I am so confused about this and am trying to sort it out.
I have seen a Henry Coffman's War of 1812 application showing his wife as Hester Bewley. The name only shows as Henry, not John Henry. Is this the same document you mention as application for land? If not, where can I find the document you are referencing?
However, I do have a copy of Abraham Coffman's will and he does not list a son by the name of John Henry Coffman. He has listed a John Coffman as son and a Henry P. Coffman as a grandson (my g-grandfather).