In my FTM files, I have BLAIR and McNeil. A James McNeil originated in Mayo, Ireland about 1810-1870, married to a Mary Redmond. This is what I have, but, all data could have mistakes.
I also have a James E., 2 John's, William, and a Joseph McNeill, and Samuel McNeill, and a Mary McNiel.
I have a Olive O'Neal, married to a James Clayborn Cottingham.
I don't think is the people you are searching for.