A little bit more information would make it easier to help you out.
Any idea what state she might have been born in ?
You say she had 4 children with John Allen, do you know any of there names ?
You say she had 2 children with Thomas Stoddard, what are there names ?
You say 1 of those children who your father, when was he born, where was he born, is he still living (if not when and where did he die) ?