You wrote: > Richard Gumb's younger sister Elizabeth (1812) was my 3xGt Grandmother
This date (1812) concerns me, because, (and bearing in mind the details posted in the other post I send a few minutes ago), 1794, the date I have for Richard Gumb's sister, would make your Elizabeth young enough to be my Elizabeth's daughter, if she had married early. Her marriage to Samuel Doney (30-Apr-1836 at Linkinhorne) was at quite a late age, and it wouldn't be entirely unusual in this family for it to have been a second marriage, BUT that would be confirmed or refuted in the marriage certificate if anyone has it. If you have seen data in her marriage that points to her being born in 1812, then maybe she lied about her age? -- If the birth records clearly point to 1794.
Or maybe this is an entirely different, although in all likelihood, closely related, siblings Richard and Elizabeth Gumb?