Looking at some of the smaller trees, there is one that has John Dunkeld b. 1779 Keir married or linked to a Margaret Harkness who married a James Robb/Webb in Irteland. That party gets complicated
Interestingly though one of the dau's, Mary Dunkeld, marries a James Gordon and has a son, James Dunkeld Gordon b. 1831 Glencairn.
Geoff
EDIT: James was married in Balmclennan, fits with 1851 for place