In the 1880 census the family is as follows:
Freiberg, Albert 28, brewer, born Germany
Emilie, 26, Keping House, born Germany
The lived on 21st avenue in Milwaukee
Page 25, SD 1, ED 12, dated 9 June 1880
Since I live int he Milwaukee area, I can try and find an obituary for Emilie if you want. I don't know how far you've gotten since this posting.