Looking for Stoltze of Chicago Illinois

My Grandfather was Herman Stoltze, born in Chicago, Illinois in 1894. My Great Grandparents were Gustave Stoltze, born in Germany around 1853, and Anna Margaret Heiner, born in Illinois in 1867. Gustave and Anna were married in Chicago, Illinois, lived there a number of years and also lived in Salt Lake, Utah. Gustave and Anna had three children, Bertha, Herman, and Walter. Any information on Bertha would be appreciated.

Thank you