The only ones close are:
McMillan, David, NY, Wisc, 5/2/1887, C5166
McMillan, James W & Minerva, Ind, DC, 5/11/1903, C556489 (the Pension number could be a type, because most are not that long)
McMullin, James, Ind, 5/14/1888, A19380.
There were no Donalds, but two Daniels from Kansas and Arkansas.
Did you find obituaries in Wisconsin?