My understanding is Andrew Nelson, changed his name to Virch, his wife, Oline A, maiden name during the war, since there were many Nelson's in his plattoon.
Andrew born 1845, died 1923, Oline born 1857, died 1923.
My great grandfather was Niron L Virch, born 1888, died 1928, married Amanda E Schultz, born 1895, died 1974.
My father was Clifford, born 1914, died 1982, married Ethel Trippler, born 1918.
The Virch ancestors are buried in Curtis, WI, small town north of Marshfield, WI.
I'm just getting into the geneology. I have an uncle Niron Virch, in Marquette, MI, who has done some work on this.
Hope it helps