Cabinet photograph of Dr. Forkmann, Mayville, Wisconson, who I believe is Dr. Hans Heinrich Forkmann, who emigrated from Wuerzburg, Bavaria, Germany, to the United States in 1891 and became a US citizen in 1896. In 1893, he married Ottilie, who was born about 1870 in Wisconsin.
I haven't been able to find out anything about the parents of Dr. Forkmann or his wife Ottilie, but I found a reference to him in the Wisconsin Session Laws of 1915, where he was honored on the occasion of his death. It was noted that he received a law degree from the University of Munich, was a teacher of Latin and Greek at Mayville and eventually became editor of the Dodge County Banner; most importantly, he was the well-respected spokesman for the German community in Wisconsin.
Update: I've heard from a helpful reader that Ottilie was born in September 1870 in Williamstown, Wisconsin, the daughter of Henry Ruedebusch. Ottilie had an older sister named Albertine, who perhaps never married. Ottilie and Albertine are living together in the 1920 and 1930 Censuses of Mayville. Ottilie's husband Hans Heinrich Forkmann had died in 1915. Ottilie's father Henry was born in 1832 in Germany and came to the US in 1860. I haven't figured out his wife's name yet, and it's tricky, because there was apparently another Henry Ruedebusch born about the same time and also living in Wisconsin.