On my Mother's side I am a Nesbit from the Lowlands northern coast. I was able to trace her side two generations back into Scotland. I believe that there is a Nesbitt house still standing there, though not owned by a Nesbitt at this time.
Another Nesbitt right here RB, I can only trace my family to Ireland,in the late 1800's. I surmise they went to Ireland after the battle of Culloden Moor and the subsequent break up of the clans.
No proof just a hunch.
My Mother was a McGuire, and a homesick warbride, so back in '52 the family moved to Scotland.We returned back to Canada in '66
Nice place to visit, but I wouldn't want to live there.
Cheers Bob