NeSmith/NaSmyth/NaeSmyth of Posso
"The NeSmiths and the Bairds are closely joined by history and by blood. Recent DNA results show that the NeSmiths are heavily influenced by Baird lines."
Posso Tower and Castle was the home of the Bairds of Posso. The senior line ended in two daughters, one of whom married Thomas Michael Nasmyth, the other a Hay of Smiethfield. The estate was divided and the Nasmyths retained the Tower, which now is in ruins.