Hello Matthew. I'm sorry it took me so long to see your post, but I haven't visited that group's page in a while.
It's so exciting to finally hear from someone else on the family tree! Unfortunately, I have not spent any time looking into coats of arms, but I'd love to share information on the family connections. You said that you're a great grandson of Jacob. Who were your grandparents and parents? I'm descended from Jacob's daughter Laura.