David,
Hi and sorry for the delay.
I have the book of MI's from Petty old church and there are several McKenzies listed.
The names you mentioned were David and Donald i think, if so here are the listings under those names: -
David (and his wife Isobel McIntosh) - stone dated 1752
Donald (father of Kenneth) - d. 2/4/1741
Donald - d. 24/4/1831 aged 80
Donald - d. 11/11/1766 aged 80
(with this one, amongst others is Margaret Campbell - d. 13/2/1810)
also, this may be of use
John (erected by his son Donald) - d. 26/6/1846 aged 68
there was also a Dr. John McK who erected a stone for 3 of his children, early 1800's.
If even one of those is a hit then that'd be fab.
Regards,
Helen