I can't connect to your family, but I have found your Henry in the 1920 census in Wright county, Victor township. Henry age 34, Louise 34, Florence 11, Alvin 8, Alvera 2; all born in MN. I am still assuming most of the Engelman(n) families in the area are related - our family was orginally Engleman.We've been told Alwin was one of 7 or 8 children, but are unsure whom all immigrated or where. The same goes for the Mielkes, most of my connections are mid 1800's and I don't know much of the siblings. I'll let you know of any developments.