I do have your gggrandmother in my database.Myrelative is William Young Robb her brother.
My cousin and I work on this line and we are good with the parents of these two: James Eli (went by Eli) Robb and Martha Ann Young.
We thought we knew who Eli's parents were, but now not so sure and our evidence is not great.
Can you share who you have and your evidence for it?
My email is firstname.lastname@example.org
It is exciting to find others on this line. We did DNA on our Robb uncle and while we were close to two lines, they all connect back to PA.We thought ours came in through the Carolinas.One of the lines migrated I guess.