Quote Originally Posted by beowulf67 View Post
There may also be wishful American Davidsons whose Davis ancestors originated in Wales, moved to Scotland and then came to America.
There's a limit to how exhaustive you can expect people to be, though. For most people, if your forebear had the clan name and came from Scotland that's close enough. I suppose for some if they had the name and you don't know WTH they came from that might be close enough too, but personally I wouldn't go that far unless the name were clearly Gaelic in origin, which Davidson isn't.

I doubt that very many people, here or elsewhere, have their family tree so clearly mapped out that they can trace back to an ancestor who lived in the right county, at least if they have to go very far back. As it happens, I can trace back to Callaghans who actually lived in County Cork, Ireland, certainly to when they left Ireland in the 19th century, and tentatively another century before that. Very little of that was my own work, but it is a lot of work, and not many people either have the inclination or perhaps even all the data they need to do it.