Hi great to hear from you , yes my line also comes down from William 1580.Thornhill 1622, John 1655, William 1692 and so on , have a look on my tree on Ancestry and you can see how far back and also where maybe your line branched off from mine . At least we are related and share some great grandfathers . How did you find out about William 1580 as we had got stuck at Thornhill so as you can imagine my wife Cecilia who does most of the research and i were thrilled to see you had been able to research even further back. Look forward to hearing from you