"Cilly" is known from DSW's tree as a daughter of Isidor and Fanny Staub and wife of Alfred Horn. DSW shows Cilly and Alfred as the parents of Walter. According to the 1939 census, Caecilie Horn geb. Staub was born in Ratibor as were "Cilly's" older and younger brothers. On this basis I equate "Cilly" with Caecilie Horn.

Alfred Horn and Caecilie Horn geb. Staub are among others who are listed in the Breslau synagogue community address list (ca 1930) at Kirschallee 36.

Alfred and Caecilie Horn geb. Staub are listed in the 1939 census of Breslau at Kirschallee 36, along with, among others, Walter Horn born 29.12.1923 and Caecilie's 15-year old nephew, Rudolph Staub whose parents are listed at another address in Breslau. I assume that Rudolph was having a sleepover with his cousin.