I suspect the sisters were born in Berlin. Maiden name was Henninger.
Tilla married Alfred Sohn-Rethel. Their daughter Brigit was born in Berlin in 1921. Brigit is my mother.
Tilla died in Zug or Lucerne, Switzerland in 1945.
Marie died in Reit-im-Winkel, Bavaria circa 1980
Anne-Marie lived in Bavaria circa 1990.