The Brülls were an old-established Jewish family in Seubelsdorf, who practiced agriculture and cattle trade. Hugo Brüll, born 19 February 1873 in Seubelsdorf, married Frieda Freudenthal (born 15 November 1874 Theilheim) on 16 November 1902. They had three children: Fanny (born 1904), Helene (born 1907) and Wilhelm (born 1910).
Contemporary witness Margarete Milz told of many weekend visits she enjoyed with her friend Margot Wolf (Helene's daughter) at their grandparents’ home in Seubelsdorf. She described the Brülls as a hospitable and warm family. Especially Fanny, who according to Mrs. Milz suffered from a slight walking disability, had taken her to her heart.