I am also working on that family line.Here is what I can tell you.
William Charles Miller m Emma Bunch about 1891.
There children were;
Andrew William 1892
Marion Alva (Alfa) 1896
Marvin Charles 1898
Mary Alice 1900
John H 1902
Lula May 1909
James Clark 1912.
Emma is listed by several names.
Mary..as told by Lula, James Clarks' Daughter
Emma ...on death certificate
Amy...on birth certificate...( last name is Bunch on certificate) I have a copy.
Sarah in 190 census and he is listed as William T.
William was born 1875 in Indiana and she was born in 1874 in Missouri. Please message me on here for more info.