Brick wall!
Wm. Martin MILLER b.Dec.1866 IOWA. United States Census 1900 shows he and his parents were all from Iowa. William married Nancy Helen WHITE in 1892 in Wisconsin. They had five children; Hazel, Leo, Theodore, James, and Dorothy. William and Nancy were divorced in 1908 so he may have remarried. The family lived on Monterey St. in Freeport, Wisconsin in 1897.
as far as I know:
Hazel (1893) married Charles FREDRICKS
Dorothy married Charles KUECKER
William Martin was said to have been a national bicycle champion, and was in Company G 18th infantry, American expeditionary force.
Any help finding William Martin's parents and siblings would be greatly appreciated.