Researching surname Duhr. Great Great Grandfather was gameskeeper for Kaiser Wilhelm (I have no first name). His son was Constant Duhr (short for Constantinopal, which I don't know the correct spelling of). Constant came to the US as a boy, but I don't know what year, etc. Constant married Charlotte Drouillard, possibly a decendant of George Drouillard of the Louis & Clark Expedition. Charlotte's father was Desire or Hesire Drouillard born in Canada. Charlotte and Constant possibly met and married in Michigan, both are burried in Resurrection Cemetary, Clinton River Road, in Clinton Township, Macomb County, Michigan. Charlotte and Constant had a son and daughter - Frank H. Duhr (my father), and Gloria Duhr. Frank married Esther A. Sonntag in Michigan in November 1941. Esther's father was Leonard Sonntag (deceased), married to Emma Menzel (deceased). Leonard's father and mother were John & Mary Sonntag who owned a farm in Michigan, possibly Saginaw. Frank Duhr died 12/13/96. Esther Sonntag-Duhr died November 21, 1999. Does anyone know of these people? Especially gameskeeper Duhr and any descendants of George Drouillard.