Do you have a date of birth for the William McNeilly you have . I am also trying to find a William McNeilly father of David McNeilly born 1860. In 1880 I have David getting married and his fathr is noted as a Wheelwright. could there be any link to your William John McNeilly?
I am not having much luck with info on this family I do know that David was one of thirteen children, and I think that his mother lived to be 100.
Any help would be great