Here is the World War I draft registration for the 4th son of Emil and Julia Yunghans.
Like his older brother Otto, Ernst was employed as a teacher. Ernst was employed by the 1st Evangelical Lutheran Immanuel Congregation in Cedarburg, Ozaukee County, Wisconsin.
Ernst Yunghans lived only 10 minutes north of his aunt and uncle, Hulda and Otto Junghans.
This is the first link I have found that one of Emil and Julia's children lived near Emil Yunghans' younger brother, Otto Junghans, who resided in Mequon, Ozaukee County, Wisconsin.